AMD's recently launched Navi 31 "RDNA 3" GPUs, could be ready to integrate 3D V-Cache technology on future Radeon RX 7000 graphics cards. It is this stacked cache that has allowed Ryzen 5000 and Ryzen 7000 CPU models to have less gaming lag for very low-weight tasks that the CPU can do and doesn't have to do RAM, even if they make overclocking more difficult.
Tom Wassick, a semiconductor packaging engineer, recently dissected a new AMD Radeon RX 7900 XT graphics card and in doing so discovered what might be stacked cache. It is known that the Radeon RX 7900 XT comes with a disabled MCD chipdue to its 20 GB memory capacity and 320-bit bus interface, compared to the 24 GB memory capacity and 384-bit bus interface of the RX 7900 XTX.
AMD's 3D V-Cache would come to graphics cards
But according to Tom, the AMD Navi 31 GPU silicon also shows a number of components similar to the exclusion zones seen in X3D components, such as the Ryzen 7 5800X3D and the recent Ryzen 7000 X3D based on Zen 4. These exclusion zones would be similar to those seen on X3D components. They would have the same 17-18 um pitch and the first possibility why they show up on Radeon RX 7000 GPUs with RDNA 3 GPUs could have to do with the implementation of 3D V-Cache.
Angstronomics already reported in the past that AMD would incorporate 3D V-Cache to its GPUs Radeon RX 7000. He also reported that a 3D-Stacked solution would be in the works for AMD Radeon RX 7000 RDNA 3 GPUs and that would double the Infinity Cache with 32 MB (16 MB 0-hi + 16 MB 1-hi) capacity for a total of 192 MB cache.
AMD already has large cache reserves on its Radeon RX 7000 RDNA 3 GPUs in the form of Infinity Cache. Doubling it would mean a noticeable performance improvement in games with low cache, and at higher resolutions. Current AMD Ryzen 5000 X3D CPUs have already experienced a huge performance boost with 3D V-Cache and quite possibly the same will happen with Ryzen 7000 X3D CPUs.
It seems that amd will focus first on the main range. Then I would do a mid-cycle update to the RDNA 3 range with faster clocks, better efficiency, and the aforementioned V-Cache 3D in a refresh series. This will be similar to the *950 XT update that came with the RDNA 2 GPUs. In this future case, we would have a bigger performance boost than in the previous case.
Source: Wccftech
