The semiconductor standards organization JEDEC has released the final specifications for the JESD239 standard, which describes GDDR7 graphics memory. Compared to GDDR6, the new type of RAM will bring increased bandwidth, improved energy efficiency and increased chip capacity. GDDR7 memory is planned to be used not only in gaming video cards, but also in solutions for the field of resource-intensive computing and artificial intelligence.
In a press release, JEDEC claims to double the throughput of the GDDR6 standard. It will be up to 192 GB/s per chip, although the first chips will be slower. In particular, Micron and Samsung are targeting information transfer rates of up to 36 Gbit/s per contact, i.e. 144 GB/s bandwidth for a single GDDR7 chip.
To achieve such performance, GDDR7 will use PAM3 pulse amplitude modulation with three signal levels. Innovations of this standard also include doubling the number of independent channels (from two to four compared to GDDR6), core-independent LFSR training patterns, support for chips with densities from 16 to 32 Gbit and new data integrity features.
AMD and Nvidia, as well as the three largest chipmakers: Samsung, Micron and SK Hynix, have already expressed their interest in a new type of graphic memory. It is believed that the transition to GDDR7 will take place in the next generation of video cards. We will learn more details about the new 3D accelerators before the end of this year.
Source:
TechPowerUp