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|Computer memory types|
|Early stage NVRAM|
Graphics DDR SDRAM (GDDR SDRAM) is a type of synchronous dynamic random-access memory (SDRAM) specifically designed for graphics processing units (GPUs). GDDR SDRAM is distinct from the more widely known types of DDR SDRAM, such as DDR3, although they share some of the same features—including double data rate data transfers. As of 2018[update], GDDR SDRAM has been succeeded by GDDR2, GDDR3, GDDR4, GDDR5, GDDR5X, and GDDR6.
Table of transfer rates
|Module type||Chip type||Memory clock||Transfers/s||Transfer rate|
|?||GDDR2||500 MHz||?||128 Gbit/s||16.0 GB/s|
|64 lanes||GDDR3||625 MHz||2.5 GT/s||159 Gbit/s||19.9 GB/s|
|64 lanes||GDDR4||275 MHz||2.2 GT/s||140.8 Gbit/s||17.6 GB/s|
|64 lanes||GDDR5||625–1000 MHz||5–8 GT/s||320–512 Gbit/s||40–64 GB/s|
|64 lanes||GDDR5X||625–875 MHz||10–12 GT/s||640–896 Gbit/s||80–112 GB/s|
|64 lanes||GDDR6||875–1000 MHz||14–16 GT/s||896–1024 Gbit/s||112–128 GB/s|
- "Samsung Electronics Comes Out with Super-Fast 16M DDR SGRAMs". Samsung Electronics. Samsung. 17 September 1998. Retrieved 23 June 2019.
- "GRAPHICS DOUBLE DATA RATE (GDDR5) SGRAM STANDARD JESD212C". JEDEC. 2016-02-01. Retrieved 2016-08-10.
- "GRAPHICS DOUBLE DATA RATE (GDDR5X) SGRAM STANDARD JESD232". JEDEC. 2015-11-01. Retrieved 2016-08-10.
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