Almost exactly one year ago Samsung introduced GDDR6, which was capable of transmitting 24Gbps per pin. Now the company has completed the design of the next generation graphics RAM named GDD7.
This goes up to 32 Gbps per pin for a total of 1.5 Terabytes per second, 40% faster than the 1.1 Terabytes per second that GDDR6 could achieve.
The speed increase is due to the adoption of 3-level Pulse Amplitude Modulation (PAM3). PAM3 is also used in USB4 and Thunderbolt 5, for example. GDDR6X used in cards like the Nvidia RTX 3090 and 4090 uses the related PAM4 standard.
However, in addition to being faster, GDDR7 is also 20% more energy efficient. Samsung has also developed a lower operating voltage version of GDDR7 that will be used in devices with more power limitations such as laptops.
The company did something else to combat the heat, too: The epoxy molding compound (EMC) that encases the RAM chips has 70% lower thermal resistance than the EMC used in GDDR6 packages, so more heat can be carried. away faster.
Samsung will send samples to its major customers later this year so they can start working on GDDR7-based devices.
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