Published in PC Hardware

AMD is working to bring 3D V-Cache to Zen 4 mobiles

by on25 July 2023


Took long enough

AMD is reportedly bringing its 3D V-Cache technology to its Zen 4 mobile CPUs.

Desktops and servers have had V-Cache-equipped chips for a while but AMD mobile chips have lucked out.

According to an ER from @9550pro, the first chip is the Ryzen 9 7945HX3D. It will be seen in the wild in the Asus ROG Scar notebook. The chip features 16 Zen 4 cores and 128MB of L3 cache. This comprises 32MB on each of the two chipsets, plus an additional 64MB of stacked cache.

This chip is the flagship of AMD's mobile CPU range and will change its battery life and mobility as performance will improve.

If mobile V-Cache chips are successful for AMD, the tech should trickle down to the worldlier models. 8-core or 6-core V-Cache equipped chips should offer excellent gaming performance.

The non V-Cache equipped Ryzen 9 7945HX has a default TDP of 55-75W, which means any concerns over the fragile nature of the TSV interconnects that link the chiplet and cache should be absent.

V-Cache models will help at lower resolutions on systems with very high refresh rate screens. A system with a 7945HX3D, RTX 4090 and a 1080p screen is unlikely to be released, but at 1440p, a high-end GPU delivering 240 FPS or higher is possible.

Last modified on 25 July 2023
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