A little more than a year after Samsung released GDDR6, which could transmit 24Gbps per pin, the company finished creating the next generation of graphics RAM, known as GDDR7, which should allow for even faster and more power-efficient GPUs.
The new architecture provides for 32 Gbps data rates per pin, for a total bandwidth of 1.5 Terabytes per second. This is a 40% improvement above the maximum bandwidth of GDDR6 (1.1 Terabytes per second).
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This increase in speed is due to the incorporation of 3-level Pulse Amplitude Modulation (PAM3), which is also used in USB4 and Thunderbolt 5. Meanwhile, the related PAM4 standard is used in GDDR6X, which is used in graphics cards such as the Nvidia RTX 3090 and the current RTX 4090.
Aside from being faster, GDDR7 is also 20% more energy-efficient than its predecessor. Samsung has also developed a low-voltage version of GDDR7 for devices with stricter power constraints, such as laptops.
To better manage heat, the company has also innovated with the epoxy molding compound (EMC) that surrounds the RAM chips. The GDDR7 EMC is designed to have 70% less thermal resistance than the EMC in GDDR6 packages, allowing for faster heat dissipation. Another capability that should come in handy for laptop applications.
Later this year, Samsung intends to provide samples to its main clients so that they can begin developing GDDR7-based devices. This suggests that the first GDDR7-based products should be available by the end of this year or early in 2024.
