GDDR5 (Graphics Double Data Rate, version 5) SGRAM is a type of high performance dynamic random-access graphics card memory designed for applications requiring high bandwidth.
Qimonda, a spin-off of Infineon, has demonstrated and sampled GDDR5,[1] and released a paper about the technologies behind GDDR5.[2] On May 10, 2008, Qimonda announced volume production of 512 Mib GDDR5 modules rated at 3.6 Gbit/s (900 MHz), 4.0 Gbit/s (1 GHz), and 4.5 Gbit/s (1.125 GHz).[3][dated info]
Samsung had announced plans for the transition to GDDR5 by the beginning of 2008.[4] It had since announced that it had developed GDDR5 memory at 6.0 Gbit/s at 512 Mib density.[5] On February 17, 2009, Samsung announced a 7Gbit/s 1Gb density part, allowing up to 28.2 GByte/sec bandwidth.[6][dated info]
Hynix Semiconductor has introduced the industry's first 1 Gib GDDR5 memory. It supports a bandwidth of 20 GB/s on a 32-bit bus, which enables memory configurations of 1 GiB at 160 GB/s with only 8 circuits on a 256-bit bus.[7] Hynix 2Gb GDDR5 boasts with 7GHz clock speed. The newly developed GDDR5 is the fastest and highest density graphics memory available in the market. It operates at 7GHz effective clock-speed and processes up to 28GB/s with a 32-bit I/O. 2Gb GDDR5 memory chips will enable graphics cards with 2GB or more of onboard memory with 224GB/s or higher peak bandwidth. The memory maker claims that the new chip will be in demand in the second half of 2010.
On June 25, 2008, AMD became the first company to ship products using GDDR5 memory with its Radeon HD 4870 video card series, incorporating Qimonda's 512 Mb memory modules at 3.6 Gbit/s bandwidth.[8][9]
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