GDDR6, an abbreviation for graphics double data rate type six synchronous dynamic random-access memory, is a modern type of synchronous graphics random-access memory (SGRAM) with a high bandwidth ("double data rate") interface designed for use in graphics cards, game consoles, and high-performance computation.
The finalised specification was published by JEDEC in July 2017. GDDR6 offers increased per-pin bandwidth (up to 16 Gbps) and lower operating voltages (1.35 V), increasing performance and decreasing power consumption relative to GDDR5X.
At Hot Chips 2016, Samsung announced GDDR6 as the successor of GDDR5X, with production beginning in January 2018. Samsung later announced that the first products would be 16 Gbps, 1.35V chips.
SK Hynix announced its GDDR6 products would be released in early 2018. SK Hynix announced in April 2017 that its GDDR6 chips would be produced on a 21 nm process and be 10 % lower voltage than GDDR5. The SK Hynix chips are expected to be 8 Gb per chip with a transfer rate of up to 16 Gbps. However, SK Hynix's first GDDR6 products are limited to 14 Gbps. The first graphics cards to use SK Hynix's GDDR6 RAM are expected to use 12 GB of RAM with a 384-bit memory bus, yielding a bandwidth of 768 GB/s.
- GRAPHICS DOUBLE DATA RATE 6 (GDDR6) SGRAM STANDARD
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