Next -generation AMD graphics cards are getting closer and closer: Moore’s Law is Dead YouTube channel has unveiled new details on the launch timing of the first products that will bring third-generation RDNA chips to market. Most of the information is actually confirmation of previous rumors, but it is still valuable because it comes from an authoritative source with an excellent reputation on the subject. In short: the top-of-the-range video cards , whose name should logically be RX 7900 and will mount the Navi 31 GPUs, will arrive by the last quarter of 2022 , while the cheaper RX 7800, with Navi 32 GPUs, they will be presented in the first six months of the coming year.
Both GPUs should use a mix of 5nm and 6nm die , codenamed GCD (Graphics Core Die) and MCD (Multi-Cache Die), respectively, for processing and I / O + Infinity Cache. It is very likely that the Ships 31 will use the 3D die stacking technique, less so on the Ships 32. The Ships 31 should be available in at least 3 variants, with power consumption between 375 and 450 W; and may already be equipped with PCIe 5.0 x16 slots. On the performance side, the most optimistic estimates indicate improvements of between 90 and 130% for the Navi 31 compared to the RX 6900 XT, at least in rasterization operations.
It seems that AMD intends to abandon the idea of CUs, or Compute Units, in favor of the so-called WGPs, or Work Group Processors. It goes something like this: each WGP is made up of 8 SIMD32 units which in turn contain 32 ALUs. Each Shader Array contains five WGPs, each Shader Engine contains two Shader Arrays, and each GCD contains 3 Shader Engines. The Navi 31 has two GCDs, and thus it appears that it has a total of 15,360 graphics processing cores . The two GCDs will be connected to each other via a next-generation Infinity Fabric link, which is expected to include 512MB of Infinity Cache. The Navi 32, on the other hand, are similar, but the GCDs will only have two Shader Engines each, so the processing cores will drop to 10,240 (and the Infinity Cache should be 384 MB).
Below is the original video of the source that goes even further into the question – and even suggests that the design reference of the top of the range RX 7900 will have a liquid dissipation system , at least in one variant.