Home / News / How Micron’s GDDR6X memory is the secret to unlocking 4K on Nvidia’s RTX 30-series cards

How Micron’s GDDR6X memory is the secret to unlocking 4K on Nvidia’s RTX 30-series cards

Even with consoles iterating on a standard cadence, PC hardware has discovered techniques to stick forward. That is normally because of inventions that vary how laptop graphics paintings, and that is going on at the moment with Nvidia’s subsequent wave of GeForce RTX GPUs. The RTX 3070, 3080, and 3090 use Micron’s new GDDR6X reminiscence. This can be a step above the normal GDDR6 VRAM, and it might constitute a generational soar ahead in system-bandwidth efficiency due to Micron’s PAM4 tech.

Pulse amplitude modulation (PAM4) is the title for pushing 2 bits of information over a connection as a substitute of one bit. It’s a technical thought, however necessarily, this allows the formulation to name from four possible states as a substitute of two with each and every burst of knowledge. With PAM4, Micron and Nvidia are promising a vital spice up to I/O information charges and bandwidth. GDDR6X may be extra energy environment friendly. At 21Gb/s, GDDR6X makes use of 15% much less energy consistent with bit than GDDR6 at 14Gb/s.

Micron claims that GDDR6X’s per-pin information fee of 21Gb/s, whilst you mix all the ones pins and reminiscence modules on one thing just like the RTX 3090, the GPU has a complete reminiscence bandwidth of 936GB/s. That’s huge. For comparability, the reminiscence bandwidth of the Xbox Sequence X tops out at 560GB/s and the PS5 is 448GB/s.

Put merely, which means the GPU can pull an enormous quantity of information from its reminiscence instantly. And that’s going to result in higher video games.

“[Gamers] get pleasure from greater system-data charges,” Micron graphics boss Ralf Ebert mentioned in a media presentation. “That will increase the information this is transferred between the GPU and the reminiscence interface. We consider we’ll be enabling 8K resolutions and getting nearer to real-time ray tracing.”

What it in point of fact method is GPUs will after all have sufficient bandwidth to very easily maintain 4K. In an international the place even the $1,200 RTX 2080 Ti struggles to hit 60 frames consistent with 2d at 4K, GDDR6X is a the most important to striking us previous that barrier.


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