Hey, I have been wondering about the RDNA 2 CUs vs the Vega CUs, and what exactly has changed between them. Firstly we have Mark Cerny say that the PS5 CU has 62% more transistors than the PS4 CUs. I think we can safely assume this is also the case with the XSX and the Xbox One. Within the RDNA 2 CUs we have the addition of RT BVH capabilities. Looking at the following diagram from AMD, this is quite a small addition, and doesn’t really add much to the size of the CU.
And then when we compare a GCN CU to a RDNA 1 CU, other than changing around where the scheduler appears, there doesn’t seem to be a whole lot of additional tech in it. Nothing that really stands out anyway.