Samsung reports that this type of memory uses PAM3 pulse-amplitude modulation, which offers 25% higher efficiency than the NRZ (Non-Return to Zero) currently used in GDDR6 memory.
GDDR7 will support bandwidths of up to 36Gbps, twice as fast as the current 18Gbps chips used in most Radeon RX 6000 graphics cards. The soon-to-be-released Radeon 7000 series has 20Gbps GDDR6 memory, but it will still be slower than the GDDR6X standard developed by Micron and NVIDIA for the GeForce RTX 30 and 40 GPUs. This technology uses the PAM4 signal method and delivers speeds up to 23Gbps.
A graphics card with GDDR7 memory will deliver up to 1152 GB/s with a 256-bit memory bus and 1728 GB/s with a 384-bit memory controller bus. GDDR7 memory is still under development and will not be used in video cards in the near future, and Samsung did not specify a timeline and plans for introducing the new standard.
