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GDDR3, Graphics Double Data Rate 3, is a graphics card-specific memory technology, designed by ATI Technologies[1] with the collaboration of JEDEC. SDRAM refers to synchronous Dynamic random access memory, a term that is used to describe dynamic random access memory that has a synchronous interface SDRAM refers to synchronous Dynamic random access memory, a term that is used to describe dynamic random access memory that has a synchronous interface DDR SDRAM ( double data rate synchronous dynamic random access memory) is a class of memory Integrated circuit used in Computers It achieves nearly twice In Electronic engineering, DDR3 SDRAM or double-data-rate three Synchronous dynamic random access memory is a Random access memory Direct Rambus DRAM or DRDRAM (sometimes just called Rambus DRAM or RDRAM) is a type of synchronous dynamic RAM, designed by the Rambus XDR DRAM or extreme data rate Dynamic random access memory is a high-performance RAM interface and successor to the Rambus RDRAM it XDR2 DRAM is a type of Dynamic Random Access Memory that is offered by Rambus. V irtual C hannel R andom A ccess M emory ( VC-RAM GDDR4 SDRAM (Graphics Double Data Rate version 4 is a type of Graphics card memory specified by the JEDEC Semiconductor Memory Standard GDDR5 (Graphics Double Data Rate version 5 is a type of Graphics card memory the standards of which were set out in the GDDR5 specification by JEDEC JEDEC Solid State Technology Association, formerly known as J oint E lectron D evice E ngineering C ouncil ( JEDEC) or Joint
It has much the same technological base as DDR2, but the power and heat dispersal requirements have been reduced somewhat, allowing for higher-speed memory modules, and simplified cooling systems. Unlike the DDR2 used on graphics cards, GDDR3 is unrelated to the JEDEC DDR3 specification. JEDEC Solid State Technology Association, formerly known as J oint E lectron D evice E ngineering C ouncil ( JEDEC) or Joint In Electronic engineering, DDR3 SDRAM or double-data-rate three Synchronous dynamic random access memory is a Random access memory This memory uses internal terminators, enabling it to better handle certain graphics demands. To improve bandwidth, GDDR3 memory transfers 4 bits of data per pin in 2 clock cycles. A bit is a binary digit, taking a value of either 0 or 1 Binary digits are a basic unit of Information storage and communication In Electronics and especially synchronous Digital circuits a clock signal is a signal used to coordinate the actions of two or more circuits
The GDDR3 Interface transfers two 32 bit wide data words per clock cycle from the I/O pins. Corresponding to the 4n-pre fetch a single write or read access consists of a 128 bit wide, one-clock-cycle data transfer at the internal memory core and four corresponding 32 bit wide, one-half-clock-cycle data transfers at the I/O Pins. Single-ended unidirectional Read and Write Data strobes are transmitted simultaneously with Read and Write data respectively in order to capture data properly at the receivers of both the Graphics SDRAM and the controller. Data strobes are organized per byte of the 32 bit wide interface.
Despite being designed by ATI, the first card to use the technology was nVidia's GeForce FX 5700 Ultra, where it replaced the DDR2 modules used up to that time. The multinational NVIDIA Corporation ( (ɪnˈvɪdiə specializes in the manufacture of graphics-processor technologies for Workstations The GeForce FX or "GeForce 5" series ( Codenamed NV30) is a line of Graphics cards from the manufacturer Nvidia. The next card to use GDDR3 was nVidia's GeForce 6800 Ultra, where it was key in maintaining reasonable power requirements compared to the card's predecessor, the GeForce 5950 Ultra. The GeForce 6 Series ( Codenamed NV40) is Nvidia 's sixth generation of GeForce graphics chipsets. The GeForce FX or "GeForce 5" series ( Codenamed NV30) is a line of Graphics cards from the manufacturer Nvidia. ATI began using the memory on its Radeon X800 cards. ATI Radeon is a brand of Graphics processing units (GPU that since 2000 has been manufactured by ATI Technologies and subsequently AMD and is GDDR3 was Sony's choice for the PlayStation 3 gaming console's graphics processor, although the main system memory is comprised of XDR DRAM designed by Rambus Incorporated. is a multinational conglomerate corporation headquartered in Minato Tokyo, Japan, and one of the world's largest Media conglomerates with XDR DRAM or extreme data rate Dynamic random access memory is a high-performance RAM interface and successor to the Rambus RDRAM it Rambus Incorporated ( founded in 1990, is a provider of high-speed interface technology most notably their Rambus Dynamic RAM memory technology, which Microsoft's Xbox 360 is also shipped with 512 MiB of GDDR3 memory, and is helping to pioneer the use of this memory as standard system memory rather than only video memory. Microsoft Corporation is an American multinational Computer technology Corporation, which rose to dominate the Home computer The Xbox 360 is the second Video game console produced by Microsoft, and was developed in cooperation with IBM, ATI, and SiS. A mebibyte (a contraction of me ga bi nary byte) is a unit of Information or Computer storage, abbreviated MiB.
Advantages of GDDR3
- GDDR3s strobe signal unlike GDDR2 is Uni Directional & Single-ended (RDQS, WDQS). This means there is a separate read and write data strobe allowing for a quicker read to write ratio than GDDR2.
- GDDR3 has a hardware reset capability allowing it to flush all data from memory and then start again.
- Lower voltage requirements leads to lower power requirements.
- Higher clock frequencies.
External Links
References
- Gregory Agostinelli. Video memory is a term generally used in Computers to describe some form of writable memory usually RAM, dedicated to the purpose of holding the information necessary This is a list of device bandwidths: the Net bit rate (or more informally Digital bandwidth) of some computer devices employing methods of data transport is quantified Method and Apparatus for fine tuning a memory interface. US PATENT OFFICE.
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