Samsung confirms that GDDR7 uses PAM3 signal
Coming to your computers in the future.
Samsung confirms that its next-generation GDDR7 memory technology will be up to 25% more energy efficient than the GDDR6 standard. The company revealed that this type of memory uses PAM3 (Pulse Amplitude Modulation) signals, providing 25% higher efficiency than the NRZ (Non Return to Zero) currently used by the GDDR6 standard.
Samsung confirms that GDDR7 should now support up to 36 Gbps bandwidth, twice the speed of the current 18 Gbps chips used by most Radeon RX 6000 GPUs. The soon to be released Radeon 7000 series features 20 Gbps GDDR6 memory, but it will still be slower than the GDDR6X standard developed by Micron and NVIDIA for GeForce RTX 30/40 GPUs. This technology uses the PAM4 signaling method and offers speeds of up to 23 Gbps.
A graphics card using the GDDR7 standard will provide up to 1152 GB/s of bandwidth on a 256-bit memory bus and 1728 GB/s when connected to 384-bit memory controllers. GDDR7 memory technology is not expected to be used in graphics cards anytime soon, and furthermore, Samsung has yet to specify the timeline and plans for adopting the standard.
The source:@employee On the other side TechPowerUP