It appears from the presentation that the RT solutions from ps5 compared to XSX is different. In summary, appears to be superior on the XSX.
Cerny says it's built into the cu ie...would be limited by the CUs, not dedicated but accelerated by the enhanced CU hardware. Effectively, with RT, the ps5 CUs get used for that purpose.
Whereas in the DF article on Eurogamer Andrew Gossen said the XSX was separate..ie .dedicated, hence the 25 TF number he stated because it runs separate and in parallel. Like it's a separate piece of hardware. Sounds much stronger in RT than ps5 because it can run in parallel non the X. Like "could have been done in shaders"(but isn't like it's done in the ps5", "offloaded onto dedicated hardware" and "run in parallel with full performance"(separate, in addition to, unlike ps5),...which he States is why he is saying 25TFs if ran with Ray tracing on.
I quote, and note the differences vs ps5:
"Without hardware acceleration, this work could have been done in the shaders, but would have consumed over 13 TFLOPs alone," says Andrew Goossen. "For the Series X, this work is offloaded onto dedicated hardware and the shader can continue to run in parallel with full performance. In other words, Series X can effectively tap the equivalent of well over 25 TFLOPs of performance while ray tracing."
XSX Ray tracing sounds much stronger because of additional, separate, dedicated hardware that can run in parallel...ie...25TFs with Ray tracing. Which is like Nvidia s separate RT cores, MS appears to have a separate block of AMD RT cores. It even sounds like MS can use the CUs cores together with the separate AMD RT cores together for the "25TFs" of Ray tracing , which I wonder if the full path Minecraft Ray tracing is doing..ie .using more than just the dedicated block?
This is it. After months of teaser trailers, blog posts and even the occasional leak, we can finally reveal firm, hard …
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And based on the fact that Cerny previously routed rapid pack math..ie..fp16 for the PS4 pro(8TFs fp16 talk anyone?) but but makes no mention similar to Gossen in Cernys tech , dev friendly deep dive in regards to RT(like Gossens 25 TFs) like he does comparing PS4 CUs to Ps5 CUs equivalency...and does state it's built in...makes me think they are different in this way....ps5 built in to CUs vs XSX additional dedicated hardware.
Sony isn't touting RT to the same degree and performance level that MS is.
I am not saying this is for sure, but if I had to say, this appears to be the case based on the details that have been shared so far from both sides.