For its part, the GDDDR7 should start at 36 Gbps if we are to believe the figures put forward by Samsung, which is now considering a gradual increase in power to reach a maximum of 50 Gbps.
Such a speed would obviously be a godsend for AMD or NVIDIA and their future GeForce RTX 5000/Radeon RX 8000. These are only estimates, but if the two brands keep 256-bit or 384-bit buses, the GDDR7 would make it possible to achieve much higher bandwidths than the current generation, respectively 1.15 and 1.7 TB/s.
Samsung will not be alone in this niche and the company Cadence has announced the development of a first verification solution for GDDR7. It is also a question of confirming the use of PAM3 signaling on the contrary of GDDR6 (PAM2) or GDDR6X (PAM4).
Without going into details that are beyond us, PAM3 signaling is logically more efficient than PAM2 (transfer of 3 bits every two cycles once morest 1 bit/cycle). Slower than PAM4 (2 bits/cycle), PAM3 is however less sensitive to disturbances.
