JEDEC Releases Specifications for GDDR7: A Game-Changer in Graphics Technology

Acceleration for graphics cards will be much needed because GDDR7 memory has arrived

by Sededin Dedovic
JEDEC Releases Specifications for GDDR7: A Game-Changer in Graphics Technology
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Nvidia played a key role in developing faster alternatives through the GDDR6X standard, which started at 19 Gbps in the RTX 3080 and reached an impressive 23 Gbps in the latest RTX 4080 Super GPU. Micron, an American semiconductor designer, rates its GDDR6X memory chips with the potential of up to 24 Gbps, which would mean a whopping 96 GB/s of bandwidth per device.

Technology enthusiasts greeted this news with excitement. However, now GDDR7 VRAM is entering the scene, announced with the aim of providing a significant increase in maximum data throughput and overall speed. JEDEC specifications state that the new GDDR7 memory will reach as much as 192 GB/s of bandwidth per device, which means an impressive 48 Gbps of memory speed, twice that of the fastest GDDR6X memory chip.

VRAM 7 represents something we didn't even imagine would be possible just 10 years ago. This is a crucial moment for graphics performance as memory speed plays a crucial role in games and applications that require VRAM. However, achieving these speeds does not come in the same way as with previous memory solutions.

GDDR7 will use three signaling levels (-1, 0, +1) to transfer three bits of data in two cycles, a significant change from the NRZ (non-return-to-zero) signaling used in GDDR6. This change brings a 50 percent improvement in data transfer efficiency, which means that the base frequencies do not have to be twice as high as GDDR6.

In addition, GDDR7 will use a linear feedback system of register training patterns to improve accuracy and reduce training time. Also, GDDR7 will have twice as many independent channels (four instead of two in GDDR6) and will use PAM3 signaling.

The publication of the JEDEC standard marks an important milestone and suggests that the public availability and use of GDDR7 solutions will become inevitable. However, this information is not completely new because Samsung already revealed many key details about GDDR7 last July, which tells us enough that we have already entered a new era of VRAM.

This new generation of memory is expected to bring a significant improvement in the performance of graphics cards, opening the door for advanced visual effects and a more fluid experience in games and other demanding applications.