The GDDR7 SGRAM specification supports a maximum data transfer rate of 48 GT/s, but the first generation GDDR7 memory devices can operate with up to 32 GT/s data transfer rate. But it looks like GDDR7 will evolve pretty quickly as at the upcoming International Solid-State Circuits Conference (ISSCC), both Samsung and SK hynix plan to discuss their GDDR7 solutions with a 42 GT/s data transfer rate, according to the advanced program of the event.
Samsung plans to describe its 24Gb (3GB) GDDR7 memory device with various enhancements that can support data transfer rates of up to 42.5 GT/s, which means a peak bandwidth of up to 170 GB/s. This device is set to offer tangible improvements in capacity and performance compared to existing GDDR7 products. Currently, the company produces 16Gb (2GB) GDDR7 memory chips that can operate at up to 32 GT/s, thus providing a peak memory bandwidth of 128 GB/s.
