Celeron Central processing unit
Produced:	From April 1998 to Current
Manufacturer:	Intel
Max CPU clock:	266 MHz to 3. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. 60 GHz
FSB speeds:	66 MHz to 800 MT/s
Min feature size:	0. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. In Personal computers the Front Side Bus ( FSB) is the bus that carries data between the CPU and the northbridge. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Gigatransfer (GT and Megatransfer (MT are terms used in computer technology referring to a number of data transfers (or operations 25 µm to 0. A micrometre ( American spelling: micrometer; symbol µm) is one millionth of a Metre, or equivalently one thousandth of a Millimetre 065 µm
Instruction set:	x86, x86-64
Microarchitecture:	P6, NetBurst, Core
Sockets: Slot 1 Socket 370 Socket 478 LGA 775 Socket M
Core names: Covington Mendocino Coppermine-128 Tualatin-256 Willamette-128 Northwood-128 Prescott-256

The Celeron brand refers to a range of Intel's x86 CPUs for budget/value personal computers. An instruction set is a list of all the instructions and all their variations that a processor can execute See also X86 assembly language The generic term x86 refers to the most commercially successful Instruction set architecture in the history of Personal x86-64 is a Superset of the x86 instruction set architecture. In Computer engineering, microarchitecture (sometime abbreviated to µarch or uarch is a description of the Electrical circuitry of a Computer, Central The P6 Microarchitecture is the sixth generation Intel X86 Microprocessor architecture released in 1995. The Intel NetBurst Microarchitecture, called P68 inside Intel was the successor to the P6 microarchitecture in the X86 family of CPUs The Intel Core microarchitecture (previously known as the Intel Next-Generation Micro-Architecture, or NGMA is a multi-core processor Slot 1 refers to the physical and electrical specification for the connector used by some of Intel 's microprocessors including the Celeron, Pentium II Socket 370 (also known as the PGA370 socket) is a common format of CPU socket first used by Intel for Pentium III and Celeron In Computing, Socket 478 is a type of CPU socket used for Intel 's Pentium 4 and Celeron series CPUs. Socket M is a CPU interface introduced by Intel in 2006 for the Intel Core line of mobile processors. See also X86 assembly language The generic term x86 refers to the most commercially successful Instruction set architecture in the history of Personal A personal computer ( PC) is any Computer whose original sales price size and capabilities make it useful for individuals and which is intended to be operated Considered Intel's "economic" processor, the Celeron branded processors have complemented Intel's higher-performance (and more expensive) brands. Intel has given the brand the motto, "delivering great quality at an exceptional value. " Celeron processors can run all IA-32 computer programs, but their performance is somewhat lower when compared to similar, but higher priced, Intel CPU brands. IA-32 ( Intel Architecture 32-bit) often generically called X86 or x86-32, is the Instruction set architecture of Intel Computer programs (also software programs, or just programs) are instructions for a Computer. For example, the Celeron brand will often have less cache memory, or have advanced features purposely disabled. These missing features have had a variable impact on performance. In some cases, the effect was significant and in other cases the differences were relatively minor. Many of the Celeron designs have achieved a very high "bang to the buck," while at other times, the performance difference has been noticeable. " Theory of value " is a generic term which encompasses all the theories within Economics that attempt to explain the Exchange value or Price of For example, some intense application software, such as cutting edge PC games, programs for video compression, video editing, or solid modeling (CAD, engineering analysis, computer graphics and animation, rapid prototyping, medical testing, product visualization, and visualization of scientific research), etc. Application software is a subclass of Computer software that employs the capabilities of a computer directly and thoroughly to a task that the user wishes to perform A personal computer Game (also known as a computer game or simply PC game) is a Video game played on a Personal computer, rather Video compression refers to reducing the quantity of Data used to represent video images and is a straightforward combination of Image compression and Motion The term video editing can refer to Non-linear editing system, using computers with Video editing software Linear video editing Solid modeling (or modelling) is the unambiguous representation of the solid parts of an object that is models of solid objects suitable for computer processing Engineering is the Discipline and Profession of applying technical and scientific Knowledge and Computer graphics are Graphics created by Computers and more generally the Representation and Manipulation of Pictorial Data The bouncing ball animation (below consists of these 6 frames Rapid (or throwaway Software prototyping also describes a practice in the Software development process or application development process and sometimes refers See also Visualization and Information graphics Visualization is any technique for creating Images Diagrams or ^[1] may not perform as well on the Celeron family. This has been the primary justification for the higher cost of other Intel CPU brands vs. the Celeron.

Introduced in April 1998,^[2] the first Celeron branded CPU was based on the Pentium II branded core. Year 1998 ( MCMXCVIII) was a Common year starting on Thursday (link will display full 1998 Gregorian calendar) The Pentium II brand refers to Intel 's sixth-generation Microarchitecture (" Intel P6 " and x86 -compatible Microprocessors Subsequent Celeron branded CPUs were based on the Pentium III, Pentium 4, Pentium M, and Core 2 Duo branded processors. Pentium III variants Katmai The first Pentium III variant was the Katmai (Intel product code 80525 The Pentium 4 brand refers to Intel 's line of single- core mainstream desktop and Laptop Central processing units (CPUs introduced Overview The Pentium M represented a new and radical departure for Intel as it was not a low-power version of the desktop-oriented Pentium 4, but instead a heavily modified The Core 2 brand refers to a range of Intel 's consumer 64-bit dual-core and 2x2 MCM quad-core CPUs with the X86-64 instruction set The latest Celeron design (as of January 2008) is based on the Core 2 Duo (Allendale). The Core 2 brand refers to a range of Intel 's consumer 64-bit dual-core and 2x2 MCM quad-core CPUs with the X86-64 instruction set This design features independent processing cores (CPUs), but with only 25% as much cache memory as the comparable Core 2 Duo offering.

Contents 1 Background 2 Celeron (P6) 2.1 Covington 2.2 Mendocino 2.3 Coppermine-128 2.4 Tualatin-256 3 Celeron (NetBurst) 3.1 Willamette-128 3.2 Northwood-128 4 Celeron D 4.1 Prescott-256 4.2 Cedar Mill-512 5 Celeron (Core) 5.1 Conroe-L 6 Celeron Dual-Core (Core) 6.1 Allendale-512 7 Mobile Celeron and Celeron M 7.1 Tualatin-256 7.2 Northwood-256 7.3 Banias-512 7.4 Shelton 7.5 Dothan-1024 7.6 Yonah-1024 7.7 Merom-1024 8 See also 9 References 10 External links

Background

As a product concept, the Celeron was introduced in response to Intel's loss of the low-end market, in particular to Cyrix's 6x86, AMD's K6, and IDT Winchip. Market share, in Strategic management and Marketing, is the percentage or proportion of the total available Market or Market segment that is Cyrix was a CPU manufacturer that began in 1978 in Richardson Texas as a specialist supplier of high-performance math co-processors for 286 and The Cyrix 6x86 (codename M1 is a sixth-generation 32-bit 80x86 -compatible Microprocessor designed by Cyrix and manufactured by IBM The K6 microprocessor was launched by AMD in 1997 The main advantage of this particular microprocessor is that it was designed to fit into existing desktop designs for IDT ( was founded in 1980 as a Semiconductor vendor Employing approximately 2500 people worldwide headquartered in San Jose California and operating The WinChip series was a low-power Socket 7 -based X86 processor designed by Centaur Technology and marketed by its parent company Intel's existing low-end product, the Pentium MMX, was no longer performance competitive at 233 MHz. The Pentium brand refers to Intel 's single-core x86 Microprocessor based on the P5 fifth-generation Microarchitecture. ^[3] Although a faster Pentium MMX would have been a lower-risk strategy, the industry standard Socket 7 platform hosted a market of competitor CPUs which could be drop-in replacements for the Pentium MMX. Socket 7 is a physical and electrical specification for an X86 -style CPU socket on a personal computer Motherboard. Instead, Intel pursued a budget part that was pin-compatible with their high-end Pentium II product, using the Pentium II's (Slot 1) interface. The Pentium II brand refers to Intel 's sixth-generation Microarchitecture (" Intel P6 " and x86 -compatible Microprocessors Slot 1 refers to the physical and electrical specification for the connector used by some of Intel 's microprocessors including the Celeron, Pentium II The Celeron was used in many low end machines and, in some ways, became the standard for non gaming computers.

Intel Celeron processor family
Original Logo	New Logo	Desktop			Laptop
		Code-named	Core	Date released	Code-named	Core	Date released
		Covington Mendocino Coppermine Tualatin Willamette Northwood Conroe-L	(250nm) (250nm) (180nm) (130nm) (180nm) (130nm) (65nm)	Apr 1998 Aug 1998 Mar 2000 Oct 2001 May 2002 Sep 2002 Jun 2007	Yonah-512 Merom-L Socket P	(65nm) (65nm)	Apr 2006 Jan 2007
					Mendocino Coppermine Tualatin Northwood Banias Dothan Yonah Merom	(250nm) (180nm) (130nm) (130nm) (130nm) (90nm) (65nm) (65nm)	Jan 1999 Feb 2000 Apr 2002 Jun 2002 Jan 2004 Aug 2004 Apr 2006 Jan 2007
		Prescott Cedar Mill	(90nm) (65nm)	Jun 2004 May 2006
		Allendale	dual (65nm)	Jan 2008	Penryn	dual (45nm)	May 2008*
* Date to be confirmed List of Intel Celeron microprocessors

Celeron (P6)

Covington

The first Celeron (codenamed Covington) was essentially a 266 MHz Deschutes Pentium II manufactured without any secondary cache at all. The Celeron is a family of microprocessors from Intel targeted at the low-end consumer market ^[4] Covington also shared the 80523 product code of Deschutes. Although clocked at 266 or 300 MHz (frequencies 33 or 66 MHz higher than the desktop version of the Pentium w/MMX), the cacheless Celerons were a good deal slower than the parts they were designed to replace. ^[3] Substantial numbers were sold on first release, largely on the strength of the Intel name, but the Celeron quickly achieved a poor reputation both in the trade press and among computer professionals. ^[5] The initial market interest faded rapidly in the face of its poor performance and with sales at a very low level, Intel felt obliged to develop a substantially faster replacement as soon as possible. Sao Paulo Stock Exchangejpg|thumb| Virtual market arena where buyer and seller are not present and trade via intemediates and electronical information Nevertheless the first Celerons were quite popular among some overclockers, for their flexible overclockability and reasonable price. ^[3] Covington was only manufactured in slot 1 SEPP format. Slot 1 refers to the physical and electrical specification for the connector used by some of Intel 's microprocessors including the Celeron, Pentium II

Mendocino

The Mendocino Celeron, launched 24 August 1998, was the first mass-market CPU to use on-die L2 cache. Events 49 BC - Julius Caesar 's General Gaius Scribonius Curio is defeated in the Second Battle of the Bagradas River Year 1998 ( MCMXCVIII) was a Common year starting on Thursday (link will display full 1998 Gregorian calendar) ^[6] Whereas Covington had no secondary cache at all, Mendocino included 128 KiB of L2 cache running at full clock speed. A kilobyte (derived from the SI prefix Kilo -, meaning 1000 is a unit of Information or Computer storage equal to either 1024 The first Mendocino-core Celeron was clocked at a then-modest 300 MHz but offered almost twice the performance of the old cacheless Covington Celeron at the same clock speed. To distinguish it from the older Covington 300 MHz, Intel called the Mendocino core Celeron 300A. ^[6] Although the other Mendocino Celerons (the 333 MHz part, for example) did not have an "A" appended, some people call all Mendocino processors "Celeron-A" regardless of speed.

The new Mendocino core Celeron was a good performer from the outset. Indeed, most industry analysts regarded the first Mendocino-based Celerons as too successful—performance was sufficiently high to not only compete strongly with rival parts, but also to attract buyers away from Intel's high-profit flagship, the Pentium II. Overclockers soon discovered that, given a high-end motherboard, the Celeron 300A could run reliably at 450 MHz. A motherboard is the central or primary Printed circuit board (PCB making up a complex electronic system such as a modern Computer or Laptop This was achieved by simply increasing the Front Side Bus (FSB) speed from the stock 66 MHz to the 100 MHz spec of the Pentium II. In Personal computers the Front Side Bus ( FSB) is the bus that carries data between the CPU and the northbridge. The Pentium II brand refers to Intel 's sixth-generation Microarchitecture (" Intel P6 " and x86 -compatible Microprocessors At this speed, the Mendocino Celeron rivaled the fastest x86 processors available. ^[6]

At the time on-die cache was difficult to manufacture; especially L2 as more of it is needed to attain an adequate level of performance. A benefit of on-die cache is that it operates at the same clock frequency as the CPU. All other Intel CPUs at that time used motherboard mounted or slot mounted secondary L2 cache, which was very easy to manufacture, cheap, and simple to enlarge to any desired size (typical cache sizes were 512 KiB or 1 MiB), but they carried the performance penalty of slower cache speed, typically running at FSB speed (60 to 100 MHz) for motherboard mounted L2 cache. The implementation of the Pentium II's 512 KiB of L2 cache was unique at the time (and later copied by AMD's Athlon), comprising moderately high-speed L2 cache chips mounted on a special-purpose board alongside the processor itself, running at half processor speed and communicating with the CPU through a special backside bus. In Personal computer Microprocessor architecture a back side bus ( BSB) or backside bus, is a Computer bus used to connect the This method of cache placement was expensive and imposed practical cache-size limits, but allowed the Pentium II to be clocked faster and avoided front side bus RAM/L2 cache contention typical with motherboard-placed L2 cache configurations. In Personal computers the Front Side Bus ( FSB) is the bus that carries data between the CPU and the northbridge. ^[7]

Over time, newer Mendocino processors were released at 333, 366, 400, 433, 466, 500, and 533 MHz. The "Mendocino" Celeron CPU came only designed for a 66 MHz frontside bus, but this would not be a serious performance bottleneck until clock speeds reached higher levels.

The Mendocino Celerons also introduced new packaging. When the Mendocinos debuted they came in both a Slot 1 SEPP and Socket 370 PPGA package. Socket 370 (also known as the PGA370 socket) is a common format of CPU socket first used by Intel for Pentium III and Celeron A pin grid array, often abbreviated PGA, refers to the arrangement of pins on the integrated circuit packaging The Slot 1 form had been designed to accommodate the off-chip cache of the Pentium II and had mounting problems with motherboards. Because all Celerons are a single-chip design, however, there was no reason to retain the slot packaging for L2 cache storage, and Intel discontinued the Slot 1 variant: beginning with the 466 MHz part, only the PPGA Socket 370 form was offered. (Third-party manufacturers made motherboard slot-to-socket adapters (nicknamed Slotkets) available for a few dollars, which allowed, for example, a Celeron 500 to be fitted to a Slot 1 motherboard. In Computer hardware terminology slotkets, also known as slockets, (both short for slot to socket adapter) are adapters that allow socket-based ) One interesting note about the PPGA Socket 370 Mendocinos is that SMP (symmetric multiprocessing) mode was available, and there was at least one motherboard released (the ABIT BP6) which took advantage of this fact. In Computing, symmetric multiprocessing or SMP involves a Multiprocessor computer-architecture where two or more identical processors can connect to a single The ABIT BP6 (introduced in 1999 was the first motherboard to allow for the use of (affordable Intel Celeron

The Mendocino also came in a mobile variant, with speeds from 266, 300, 333, 366, 400, 433, and 466, 500, 533, 566, 600 MHz.

In Intel's "Family/Model/Stepping" scheme, Mendocino CPUs are family 6, model 6 and their Intel product code is 80524. These identifiers are shared with the related Dixon Mobile Pentium II variant.

Coppermine-128

Celeron Coppermine 128 with 600 MHz (FC-PGA package)

Backside of a Celeron Coppermine 128, 600 MHz

The next generation Celeron was the Coppermine-128 (sometimes known as the "Celeron II"). Flip-chip pin grid array ( FC-PGA or FCPGA) is a form of Pin grid array processor architecture package in which the die Pentium III variants Katmai The first Pentium III variant was the Katmai (Intel product code 80525 These were a derivative of Intel's Coppermine Pentium III and were released on March 29, 2000. Pentium III variants Katmai The first Pentium III variant was the Katmai (Intel product code 80525 Events 1461 - Wars of the Roses: Battle of Towton - Edward of York defeats Queen Margaret to become King 2000 ( MM) was a Leap year that started on Saturday of the Common Era, in accordance with the Gregorian calendar. ^[8] Like the Mendocino, the Celeron-128 used 128 KiB of on-chip L2 cache and was (initially) restricted to a 66 MHz bus speed, but the big news was the addition of SSE instructions, due to the new Coppermine core. S treaming '''S'''IMD E xtensions ( SSE) is a SIMD (Single Instruction Multiple Data Instruction set extension to the X86 Other than half the L2 cache (128 KiB instead of 256 KiB) and a slower FSB (66 to 100 MHz instead of 100 to 133 MHz), the Coppermine Celeron was identical to the Coppermine Pentium III.

All Coppermine-128s were produced in the same FCPGA Socket 370 format that most Coppermine Pentium III CPUs used. Flip-chip pin grid array ( FC-PGA or FCPGA) is a form of Pin grid array processor architecture package in which the die These Celeron processors began at 533 MHz and continued through 566, 600, 633, 666, 700, 733, and 766 MHz. Because of the limitations of the 66 MHz bus, there were diminishing returns on performance as clock rate increased. On January 3, 2001, Intel switched to a 100 MHz bus with the launch of the 800 MHz Celeron, resulting in a significant performance-per-clock improvement. Events 1431 - Joan of Arc is handed over to the Bishop Pierre Cauchon. Year 2001 ( MMI) was a Common year starting on Monday according to the Gregorian calendar. ^[9] All Celeron-128 CPUs from 800 MHz and faster use the 100 MHz front side bus. Various models were made at 800, 850, 900, 950, 1000, and 1100 MHz.

In Intel's "Family/Model/Stepping" scheme, Coppermine Celerons and Pentium IIIs are family 6, model 8 and their Intel product code is 80526.

Tualatin-256

These Celeron processors, released initially at 1200 MHz (1. 2 GHz) on October 2, 2001,^[10] were based on Pentium III Tualatin core and made with a 0. Events 1187 - Siege of Jerusalem: Saladin captures Jerusalem after 88 years of Crusader rule Year 2001 ( MMI) was a Common year starting on Monday according to the Gregorian calendar. 13 micrometer process for the FCPGA2 socket 370 . Flip-chip pin grid array ( FC-PGA or FCPGA) is a form of Pin grid array processor architecture package in which the die They were nicknamed "Tualeron" — a portmanteau of the words Tualatin and Celeron. Pentium III variants Katmai The first Pentium III variant was the Katmai (Intel product code 80525 Some software and users refer to the chips as "Celeron-S", referring to the chip's lineage with the Pentium III-S, but this is not an official designation. Intel later released 1000 MHz and 1100 MHz parts (which were given the extension "A" to their name to differentiate them from the Coppermine-128 of the same speed they replaced). ^[11] A 1,300 MHz chip, launched January 4, 2002,^[12] and finally a 1,400 MHz chip, launched May 15, 2002 (the same day as the Netburst Willamette 1. Events 46 BC - Titus Labienus defeats Julius Caesar in the Battle of Ruspina. See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. Events 1252 - Pope Innocent IV issues the Papal bull Ad exstirpanda, which authorizes but also limits the See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. 7 GHz Celeron launch),^[13] marked the end of the Tualatin-256 line.

With regards to core functionality, Tualatin-256 was again quite similar to its Pentium III sibling. The most significant differences were a slower 100 MHz bus and only 256 KiB of L2 cache (whereas the Pentium III had either 256 KiB or 512 KiB of L2 cache). Furthermore, the Tualeron's L2 cache had a higher latency which boosted manufacturing yields for this budget CPU.

Despite offering much improved performance over the Coppermine Celeron it superseded, the Tualatin Celeron still suffered stiff competition from AMD's Duron budget processor. The AMD Duron was an X86 -compatible Computer processor manufactured by AMD. ^[14] Intel later responded by releasing the Netburst Willamette Celeron, and for some time Tualatin Celerons were manufactured and sold in parallel with their replacement Pentium 4-based Celerons.

In Intel's "Family/Model/Stepping" scheme, Tualatin Celerons and Pentium IIIs are family 6, model 11 and their Intel product code is 80530.

Celeron (NetBurst)

Willamette-128

These Celerons were for socket 478 and were based on the Willamette Pentium 4 core, being a completely different design compared to the previous Tualatin Celeron. The Intel NetBurst Microarchitecture, called P68 inside Intel was the successor to the P6 microarchitecture in the X86 family of CPUs The Pentium 4 brand refers to Intel 's line of single- core mainstream desktop and Laptop Central processing units (CPUs introduced The Pentium 4 brand refers to Intel 's line of single- core mainstream desktop and Laptop Central processing units (CPUs introduced These are often known as the "Celeron 4". Their L2 cache (128 KiB) is half that of the Pentium 4 Willamette's 256 KiB of L2 cache, but otherwise the two are very similar. With the transition to the Pentium 4 core the Celeron now featured SSE2 instructions. The ability to share the same socket as the Pentium 4 meant that the Celeron now had the option to use RDRAM, DDR SDRAM, or traditional SDRAM. Direct Rambus DRAM or DRDRAM (sometimes just called Rambus DRAM or RDRAM) is a type of synchronous dynamic RAM, designed by the Rambus DDR SDRAM ( double data rate synchronous dynamic random access memory) is a class of memory Integrated circuit used in Computers It achieves nearly twice SDRAM refers to synchronous Dynamic random access memory, a term that is used to describe dynamic random access memory that has a synchronous interface Willamette Celerons were launched May 15, 2002, initially at 1. Events 1252 - Pope Innocent IV issues the Papal bull Ad exstirpanda, which authorizes but also limits the See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. 7 GHz, and offered a noticeable performance improvement over the older Tualatin Celeron 1. 3 GHz part, being able to finally beat the Duron 1. 3 GHz, which at the time was AMD's top competing budget processor. ^[15] On June 12, 2002, Intel launched the last Willamette Celeron, a 1. Events 1381 - Peasants' Revolt: in England, rebels arrive at Blackheath. See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. 8 GHz model. ^[16]

In Intel's "Family/Model/Stepping" scheme, Willamette Celerons and Pentium 4s are family 15, model 1, and their Intel product code is 80531.

Northwood-128

These socket 478 Celerons are based on the Northwood Pentium 4 core, and also have 128 KiB of L2 cache. The Pentium 4 brand refers to Intel 's line of single- core mainstream desktop and Laptop Central processing units (CPUs introduced The only difference between the Northwood-128 and the Willamette-128 Celeron is the fact that it was built on the new 0. 13 micrometre process which shrunk the die size, increased the transistor count, and lowered the core voltage from 1. 7 V on the Willamette-128 to 1. 52 V for the Northwood-128. Despite these differences, they are functionally the same as the Willamette-128 Celeron, and perform largely the same clock-for-clock. The Northwood-128 family of processors were initially released as a 2. 0 GHz Model (a 1. 9 GHz model was announced earlier, but never launched^[17]) on September 18, 2002. Events 96 - Nerva is proclaimed Roman Emperor after Domitian is assassinated See also 2002 (disambiguation Year 2002 ( MMII) was a Common year starting on Tuesday of the Gregorian calendar. ^[18] Since that time Intel has released at total of 10 different speed grades ranging from 1. 8 GHz to 2. 8 GHz, before being surpassed by the Celeron D. Although the Northwood Celerons suffer considerably from their small L2 cache, some speed grades have been favored in the enthusiast market, because like the old 300A, they can run well above their rated speeds. ^[19]

In Intel's "Family/Model/Stepping" scheme, Northwood Celerons and Pentium 4s are family 15, model 2, and their Intel product code is 80532.

Celeron D

Prescott-256

Prescott-256 Celeron D processors, initially launched June 25, 2004,^[20] feature double the L1 cache (16 KiB) and L2 cache (256 KiB) as compared to the previous Willamette and Northwood desktop Celerons, by virtue of being based on the Prescott Pentium 4 core. Events 524 - Battle of Vézeronce, the Franks defeat the Burgundians "MMIV" redirects here For the Modest Mouse album see " Baron von Bullshit Rides Again " The Pentium 4 brand refers to Intel 's line of single- core mainstream desktop and Laptop Central processing units (CPUs introduced ^[21] It also features a 533 MT/s bus and SSE3, and a 3xx model number (compared to 5xx for Pentium 4s and 7xx for Pentium Ms). SSE3, also known by its Intel code name Prescott New Instructions (PNI, is the third iteration of the SSE instruction set for the IA-32 architecture The Prescott-256 Celeron D was manufactured for socket 478 as well LGA 775, and they were released carrying model numbers of 355 (3. In Computing, Socket 478 is a type of CPU socket used for Intel 's Pentium 4 and Celeron series CPUs. 33 GHz), 350 (3. 2 GHz), 345 (3. 06 GHz) 340 (2. 93 GHz), 335 (2. 80 GHz), 330 (2. 66 GHz), 325 (2. 53 GHz), 320 (2. 40 GHz), 315 (2. 26 GHz), and 310 (2. 13 GHz). They also have hardware-level support of Intel's Intel 64 technology by virtue of it also being built into the Prescott core, although the feature is disabled in all 3x0/3x5 models (with the exception of the Celeron D model 355). x86-64 is a Superset of the x86 instruction set architecture. It has been activated in all 3x1 and 3x6 models. The Intel Celeron D processor works with the Intel 845 and 865 chipset families. It should be noted that the "D" suffix actually has no official designation. It is used simply to distinguish this line of Celeron from the previous, lower performing Northwood and Willamette series, and also from the mobile series, the Celeron M. ^[22] It should also be stated that unlike the Pentium D, the Celeron D is not a dual core processor. The Pentium D brand refers to two series of Dual-core 64-bit X86 processors with the NetBurst Microarchitecture manufactured

The Celeron D was a major performance improvement over previous Netburst Celerons. A test using a variety of applications, run by Derek Wilson at Anandtech. com, showed that the new Celeron D architecture alone offered up performance improvements on average of >10% over a Northwood Celeron when both CPUs were run at the same bus and clock speed. ^[23] The addition of SSE 3 instructions and the higher FSB only added to this already impressive gain.

Despite its many improvements, the Prescott core of the Celeron D had at least one major drawback: heat. Unlike the fairly cool running Northwood Celeron, the Prescott-256 had a class-rated TDP of 73 watts, which prompted Intel to include a more intricate copper core/aluminum finned cooler to help handle the additional heat. ^[24]

In mid-2005, Intel refreshed the Celeron D with Intel 64 and XD Bit (eXecute Disable) enabled. x86-64 is a Superset of the x86 instruction set architecture. The NX bit, which stands for No eXecute, is a technology used in CPUs to segregate areas of memory for use by either storage of processor instructions (or code Model numbers increase by 1 over the previous generation (e. g. 330 became 331). This only applied to LGA 775 Celeron Ds. There is no Socket 478 CPU with 64-bit or XD Bit capabilities.

In Intel's "Family/Model/Stepping" scheme, Prescott Celeron Ds and Pentium 4s are family 15, model 3 (up to stepping E0) or 4 (stepping E0 onwards), and their Intel product code is 80546 or 80547, depending on socket type.

Cedar Mill-512

Based on the Cedar Mill Pentium 4 core, this version of the Celeron D was launched May 28, 2006,and continued the 3xx naming scheme with the Celeron D 347 (3. Events 585 BC - A Solar eclipse occurs as predicted by Greek philosopher and scientist Thales, while Alyattes is battling Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. 06 GHz), 352 (3. 2 GHz), 356 (3. 33 GHz), 360 (3. 46 GHz), and 365 (3. 6GHz). The Cedar Mill Celeron D is largely the same as the Prescott-256, except with double the L2 cache (512KB) and based on a 65nm manufacturing process. The Cedar Mill-512 Celeron D is LGA 775 exclusive. The main benefits of the Cedar Mill Celerons over the Prescott Celerons are the slightly increased performance due to the larger L2 cache, higher clock speeds, and less heat dissipation, with several models having a TDP lowered to 65 watts from Prescott's lowest offering of 73W. ^[25]

In Intel's "Family/Model/Stepping" scheme, Cedar Mill Celeron Ds and Pentium 4s are family 15, model 6, and their Intel product code is 80552.

Celeron (Core)

Conroe-L

The Conroe-L Celeron is a single-core processor built on the Intel Core microarchitecture and is thus clocked much lower than the Cedar Mill Celerons, but still outperforms them. The Intel Core microarchitecture (previously known as the Intel Next-Generation Micro-Architecture, or NGMA is a multi-core processor The Intel Core microarchitecture (previously known as the Intel Next-Generation Micro-Architecture, or NGMA is a multi-core processor It is based on the 65 nm Conroe-L core,^[26] and uses a 400-series model number sequence. The Core 2 brand refers to a range of Intel 's consumer 64-bit dual-core and 2x2 MCM quad-core CPUs with the X86-64 instruction set ^[27] The FSB was increased to 800 MHz from 533 MHz in this generation, and the TDP was decreased from 65W to 35W. As is traditional with Celerons, it does not have Intel VT-x instruction support or SpeedStep. x86 virtualization is the method by which X86 -based "guest" operating systems are run under another "host" x86 operating system with little or no modification SpeedStep is a Trademark for a series of technologies (including SpeedStep SpeedStep II and SpeedStep III built into some Intel All Conroe-L models are single-core processors for the value segment of the market, much like the AMD K8-based Sempron. Sempron has been the marketing name used by AMD for several different entry level desktop CPUs using several different technologies and CPU socket The product line was launched on June 5, 2007. Events 70 - Titus and his Roman Legions breach the middle wall of Jerusalem in the Siege of Jerusalem ^[28]

On October 21, 2007, Intel presented a new processor for its Intel Essential Series. The full name of the processor is a Celeron 220 and is soldered on the D201GLY2 motherboard. With 1. 2 GHz and a 512KB second level cache it has a TDP of 19 Watt and can be cooled passively. The Celeron 220 is the successor of the Celeron 215 which is based on a Yonah core and used on the D201GLY motherboard. This processor is exclusively used on the mini-ITX boards targeted to the sub-value market segment.

Celeron Models

launched on June 5, 2007

(with list prices per unit, for 1,000 units)

Model	Clock rate	FSB speed	L2 cache
Celeron 220	1. Events 70 - Titus and his Roman Legions breach the middle wall of Jerusalem in the Siege of Jerusalem In Personal computers the Front Side Bus ( FSB) is the bus that carries data between the CPU and the northbridge. 2 GHz	133 MHz QDR	512 KiB
Celeron 420	1. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Pumping, when referring to Computer systems is simply how many times per Clock cycle data is being transmitted A kibibyte (a contraction of ki lo bi nary byte) is a unit of Information or Computer storage, established by the International 6 GHz	200 MHz QDR	512 KiB
Celeron 430	1. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Pumping, when referring to Computer systems is simply how many times per Clock cycle data is being transmitted A kibibyte (a contraction of ki lo bi nary byte) is a unit of Information or Computer storage, established by the International 8 GHz	200 MHz QDR	512 KiB
Celeron 440	2. 0 GHz	200 MHz QDR	512 KiB

Celeron Dual-Core (Core)

Allendale-512

Intel launched the new dual core Celeron E1200 processor on January 20, 2008, based on the Allendale-512 core. The Intel Core microarchitecture (previously known as the Intel Next-Generation Micro-Architecture, or NGMA is a multi-core processor The CPU has 512KiB L2 cache, 800MT/s FSB, 1. 6GHz Clock Speed and 65W TDP. New features to the Celeron family included full enhanced halt state and enhanced Intel SpeedStep technology. SpeedStep is a Trademark for a series of technologies (including SpeedStep SpeedStep II and SpeedStep III built into some Intel Several future models are planned, up to the 2. 4GHz E1600. The new Celerons will run in any motherboard that supports current Core 2 Duo family processors. ^[29]

Celeron Models

launched on January 20, 2008

(with list prices per unit, for 1,000 units)

Model	Clock rate	FSB speed	L2 cache
Celeron E1200	1. Events 250 - Emperor Decius begins a widespread persecution of Christians in Rome. In Personal computers the Front Side Bus ( FSB) is the bus that carries data between the CPU and the northbridge. 6 GHz	200 MHz QDR	512KiB
Celeron E1400	2. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Pumping, when referring to Computer systems is simply how many times per Clock cycle data is being transmitted A kibibyte (a contraction of ki lo bi nary byte) is a unit of Information or Computer storage, established by the International 0 GHz	200 MHz QDR	512KiB

Mobile Celeron and Celeron M

Tualatin-256

These were the first Mobile Celerons, based on the Tualatin core. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. Pumping, when referring to Computer systems is simply how many times per Clock cycle data is being transmitted A kibibyte (a contraction of ki lo bi nary byte) is a unit of Information or Computer storage, established by the International These differed from their desktop counterparts in that the Mobile series were offered in both 100 MHz and 133 MHz FSB. Like the desktop Tualatins, these chips had 256KB of L2 cache.

Northwood-256

These are the Mobile Celeron range used in laptops. Also based on the Northwood core, they feature a 256 KiB L2 Cache. These Celeron processors were a good deal faster than the desktop counterparts because of their larger L2 cache sizes. ^[30] They were eventually replaced by the Celeron M brand which is built around the Pentium M processor design.

Banias-512

This Celeron (sold under the Celeron M brand) is based on the Banias Pentium M, and differs from its parent in that it has half the L2 cache, and does not support the clock-varying SpeedStep technology. Overview The Pentium M represented a new and radical departure for Intel as it was not a low-power version of the desktop-oriented Pentium 4, but instead a heavily modified SpeedStep is a Trademark for a series of technologies (including SpeedStep SpeedStep II and SpeedStep III built into some Intel It performs reasonably well compared to the Pentium M, but battery life is noticeably shorter on a Celeron M–based notebook than it is on a comparable Pentium M notebook.

A system based on the Celeron M processor may not use the Centrino brand name, regardless of what chipset and Wi-Fi components are used. Centrino is a platform- Marketing initiative from Intel. It is not a mobile CPU - rather the term covers a particular combination of mainboard Chipset A chipset is a group of Integrated circuits or chips that are designed to work together and are usually marketed as a single product Wi-Fi (ˈwaɪfaɪ is the trade name for the popular wireless technology used

In Intel's "Family/Model/Stepping" scheme, Banias Celeron Ms and Pentium Ms are family 6, model 9 and their Intel product code is 80535.

Shelton

The Shelton core is a Banias core without any L2 cache, and without SpeedStep. It is used in Intel's small form factor D845GVSH motherboard, intended for Asian and South American markets. South America is a Continent of the Americas, situated entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a The processor identifies itself as a "Intel Celeron 1. 0B GHz", to differentiate it from the previous Coppermine-128 and "Tualeron" 1. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. 0 GHz processors.

Dothan-1024

A 90 nm Celeron M with half of the L2 cache of the 90 nm Dothan Pentium Ms (twice the L2 cache of the 130nm Celeron Ms, though), and, like its predecessor, lacking SpeedStep. The first Celeron Ms that supports the XD bit was released in January 2005, in general any Celeron M released after that supports the XD bit. The NX bit, which stands for No eXecute, is a technology used in CPUs to segregate areas of memory for use by either storage of processor instructions (or code The NX bit, which stands for No eXecute, is a technology used in CPUs to segregate areas of memory for use by either storage of processor instructions (or code There is also a 512 kib low voltage version which is used in the Asus EEE PC.

In Intel's "Family/Model/Stepping" scheme, Dothan Celeron Ms and Pentium Ms are family 6, model 13 and their Intel product code is 80536.

Yonah-1024

The Celeron M 400-series is a 65 nm Celeron M based on the single-core Yonah Core Solo CPU. The Core brand refers to Intel 's 32-bit mobile Dual-core X86 CPUs that derived from the Pentium M branded processors Like its predecessors in the Celeron M series, this Celeron M has half of the L2 cache (1 MiB) of Core Solo and lacks SpeedStep. This core also brings new features to Celeron M including a faster front side bus (533 MT/s), SSE3 instructions. SSE3, also known by its Intel code name Prescott New Instructions (PNI, is the third iteration of the SSE instruction set for the IA-32 architecture September 2006 and January 4, 2008 mark a discontinuation of many Celeron M branded CPUs. ^[31]

Merom-1024

The Celeron M 520 (1. 6 GHz), 530 (1. 73 GHz), 540 (1. 86 GHz) and 550 (2. 0 GHz) are single-core 65 nm CPUs based on the Merom Core 2 architecture. The Core 2 brand refers to a range of Intel 's consumer 64-bit dual-core and 2x2 MCM quad-core CPUs with the X86-64 instruction set They feature a 533 MHz FSB, 1 MiB of L2 cache (half that of the low end Core 2 Duo's 2 MiB cache), XD-bit support, and Intel 64 technology, but lack SpeedStep and Virtualization Technology. SpeedStep is a Trademark for a series of technologies (including SpeedStep SpeedStep II and SpeedStep III built into some Intel x86 virtualization is the method by which X86 -based "guest" operating systems are run under another "host" x86 operating system with little or no modification January 4, 2008 marked the discontinuation of Merom-1024 CPUs. ^[31]

See also

• List of Intel Celeron microprocessors
• List of future Intel Celeron microprocessors

References

External links

• Celeron E1200: Dual-Core Processor Almost for Free – X-bit labs tests dual-core Celeron CPU
• Intel Celeron M Processor – Product overview
• Intel Celeron M Banias, Dothan, and Yonah specifications
• Intel Pentium II and Pentium III based Celerons at cpu-collection. de

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