Yep, I wonder about two things, for one AMD is not have a big node change but yet is gaining 50% performance increase per watt. The 36 CU PS5 is being shown to do 60FPS at 4K, not checkerboard with RT reflections at 1080p. The 5700XT 40 CU's can't even come close to usable 4K, little alone with RT. RNDA2 I can't believe is an utter whole new uber design, it is most likely based off of the original RNDA. So what is this secret sauce that it appears to be using?Well, if we go only by what AMD have already told us, which is up to 50% better performance per watt, that is a very big performance hint.
So, it really seems like we can guess how well RDNA2 / Big Navi will perform by just guessing how high they are willing to go in TDP.
Typically stock GPU's tend to top out at about 250W, if that's where they go, expect something up to 60% faster than a current 5700 XT, which means it would be trading blows with a 2080 ti.
AMD have not been shy about upping the TDP a whole lot more in the past with fancy AIO coolers though. If they are willing to go up to 350W again like they were with one of the liquid cooled Vega 64 (Fronteir edition or something?) we could be talking 125% faster than the 5700 XT which would make it the fastest consumer GPU on the market, at least until Ampere hits.
It's going to be interesting to see where this one lands.
The performance of the raytracing is a big unknown.
This was shown last year in March:
I think some do not understand that Coretek mostly uses available patents, AMD official slides/whitepapers, source code from available programs like in Linux open drivers and then he speculates, any leaks appears he will also consider. So he is basically speculating as best he can with the available data. Anyways 3d Stacked Memory either SRam or some other form, maybe MRam but doubt that since TSMC has it on 22nm process unless they are working with AMD. Putting the most intensive memory operations on a local fast very large pool/cache which for textures and transversal of the BVH would free up the regular GPU ram which could allow them to use cheaper slower DDR 6 and a smaller width bus while outperforming previous performance. I really don't know but something big I think has to be incorporated to get AMD another 50%/watt boost from basically the same process.