GDDR

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GDDR

(Graphics Double Data Rate) GDDR is double data rate (DDR) memory specialized for fast rendering on graphics cards (GPUs). Introduced in 2000, GDDR is the primary graphics RAM in use today. GDDR is technically "GDDR SDRAM" and supersedes VRAM and WRAM.

Each GDDR generation is faster and includes enhancements; however, although based on DDR memory, GDDR versions do not correspond numerically to DDR. For example, GDDR3 was based on DDR2 chips; GDDR5 on DDR3 and so on.

GDDR6
As of 2020, GDDR6 is the current version providing a 16 Gbps data rate instead of 13 Gbps for GDDR5X and twice that of GDDR5. GDDR6 also supports the same 32-byte read/write access as GDDR5. See GPU, DDR and SGRAM.
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References in periodicals archive ?
It wasn't unusual for AMD to be the only company to deploy HBM; AMD and Nvidia had split similarly over the use of GDDR4 a decade ago, with AMD adopting the technology and Nvidia choosing to stick with GDDR3.
(10) In addition to the caps on royalties for its SDR and DDR DRAM technologies, Rambus's commitment to the EC also caps royalty rates for, among other things, DDR2, DDR3, GDDR3, and GDDR4 SDRAMs and memory controllers.
Under this agreement Rambus has granted NVIDIA a patent licence for certain memory controllers at a 1% royalty rate for SDR memory controllers and a 2% royalty rate for other memory controllers, including DDR, DDR2, DDR3, LPDDR, LPDDR2, GDDR2, GDDR3, GDDR4 and portions of GDDR5 memory controllers.
The system offers maximum test speeds of 3.2 Gb/s and also can test GDDR3 and GDDR4.
The ATI Mobility Radeon HD 4800 series graphics processors are the industry's first to support GDDR5 memory technology, providing nearly twice the memory bandwidth of GDDR3 and GDDR4, contributing to improvements in game play and performance.
The GPU runs at a clock speed of 650MHz and also offers 48-pixel shaders and eight vertex shaders, responsible for adding textures and effects to graphics.ATi's standard specifications for X1950 XTX cards recommend the 512Mbytes of GDDR4 memory run at 1GHz.
AMD was the only company to make significant use of GDDR4 or HBM, after all.
The memory tester offers maximum test speeds of 3.2 Gb/s and data transmission speeds of > 1 Gb/s and can test GDDR3 and GDDR4 in addition to DDR3-SDRAM.
TELECOMWORLDWIRE-28 June 2007-Samsung's GDDR4 memory chip selected for AMD's graphics cards(C)1994-2007 M2 COMMUNICATIONS LTD http://www.m2.com
Worldwide Computer Products News-28 June 2007-Samsung's GDDR4 memory chip selected for AMD's graphics cards(C)1995-2007 M2 COMMUNICATIONS LTD http://www.m2.com
Steeply tapered edges and lights embedded around the chassis make for one of the most eye-catching models out there, and with 4GB of GDDR4 RAM and 16GB of main memory, there's enough grunt under the hood to take on today's most demanding games.