A few months ago we saw some information focused on the Radeon RX 7600 XT and Radeon RX 7700 XT that was, in general, very interesting, not only because it specified the possible key characteristics of those two new graphics cards, but also because it pointed out again that AMD was going to use two different designs, one monolithic core for the Radeon RX 7600 XT and below, and another MCM (multi-chip module) type for the Radeon RX 7700 XT and above.
Since then, we have continued to see leaks and rumors that maintained that base, that of a dual design depending on the range of each graphics card (monolithic core in mid-range and low-end, and MCM in mid-high range and high range). Several sources also appeared that assured that, with the RDNA3 architecture, which will be the basis of the new Radeon RX 7000, AMD was going to make a significant leap in terms of performance, and also efficiency, by betting on 5nm nodes and 6nm from TSMC.
The most powerful graphics cards of that new generation will be manufactured on TSMC’s 5nm node, but the cache blocks will be manufactured on the 6nm node. This means that GPUs will use a slightly more advanced node than the infinite cache system.
And speaking of infinite cache, this system will once again play a key role in improving the performance of AMD’s new graphics generation, since according to various sources, the Radeon RX 7000 could have up to 512 MB. For comparison purposes, I remind you that the Radeon RX 6900 XT has 128 MB. Thanks to this new higher capacity infinite cache system, and other important changes at the architecture level, the Radeon RX 7000 will far exceed the performance of the Radeon RX 6000.
When top of the range becomes mid range: The Radeon RX 7600 XT would outperform the Radeon RX 6900 XT
That’s the most interesting piece of information left to us by a fairly reliable source. This source has accumulated enough successes in the world, and therefore deserves a minimum of credibility. In theory, the Radeon RX 7600 XT will use a monolithic core design, meaning it will be built on the 6nm node, and could feature up to 5,120 shaders s, the same amount that the Radeon RX 6900 XT has.
The Radeon RX 7600 XT will use a higher architecture, and will have a lower memory bus (128 bits vs. 256 bits on the Radeon RX 6900 XT). However, you could compensate for that memory bus reduction with a larger amount of infinite cache. The first information indicated that it could triple the infinite cache of the Radeon RX 6900 XT. With this in mind, it’s easy to see why we say the Radeon RX 7600 XT could easily outperform it.
Right now, and with the information I have, there is nothing that makes me doubt the possibility of the Radeon RX 7600 XT outperforming the Radeon RX 6900 XT, mainly due to the impact it it could have on the performance the huge amounts of infinite cache that AMD would supposedly mount in the entire generation of Radeon RX 7000 graphics cards. However, we are talking about a possibility, and not something confirmed, so keep that in mind.
If these forecasts come true, it is obvious that the Radeon RX 7600 XT could become one of the best mid-range graphics cards of the moment. However, it will be necessary to see if AMD manages to get its act together in two keys that are increasingly important, ray tracing performance and intelligent image reconstruction.
Personally, I think an MCM-type design could solve the package level space problem that AMD had to face with the RDNA2 architecture by introducing infinite cache, but if an increase is confirmed huge amount of such cache on RDNA3 architecture, I don’t know to what extent AMD will be able to improve the ray tracing performance issue. It is also not clear to me that it will be able to introduce specialized kernels for AI applied to image rescaling and reconstruction. This is not to say that it is impossible, they could join chips dedicated to MCM design, but it would be especially complex.