| HoloDust said: Well, if the leaks are to be believed (and apparently they come from a source that was pretty spot on in previous occasions), UDNA is 2x in RT/AI per CU than RDNA4. |
There will be a gen-on-gen improvement in RT.. That's not really up for debate as it's what nVidia and AMD are concentrating on in their GPU designs currently. (And A.I)
| HoloDust said: So compared to current gen consoles (which are RDNA2 with very poor RT, with no dedicated AI hardware), this will be humongous leap in those particular aspects (compare that to very modest 20% per CU increase in raster over RDNA4, which is already way ahead of current gen consoles). |
That's actually not true.
RDNA2 actually has a Ray accelerator in each CU.
RDNA3 actually keeps the single Ray accelerator in each CU, but tends to offer more CU's or clocks at every Tier... Plus a few efficiency improvements in the RT accelerators, but that wasn't the focus of the design... Which is why in RT the jump between the 6600XT and 7600XT wasn't massive.
https://gamersnexus.net/gpus/amd-radeon-rx-7600-xt-gpu-benchmarks-review-power-efficiency-gaming#7600-xt-ray-tracing-benchmarks
With RDNA4 - AMD implemented a crap-ton of improvements, but still kept the single Ray Accelerator per CU... Improvements like a doubled intersection engine in each Ray Accelerator (Which allows for more ray-box and ray-triangle intersections per cycle) and a wider BVH as well as BVH compression and more.
https://chipsandcheese.com/p/rdna-4s-raytracing-improvements
And despite the same number of CU's and Ray Accellerators... I still saw an upwards of a 4x-5x improvement in RT heavy games like Oblivion Remastered and Cyberpunk at 1440P ultra settings. (But limited VRAM likely played a role in that on the 6600XT)
https://www.techspot.com/review/2996-amd-radeon-9060-xt/
Considering the de-focus on raster and priority focus on RT and A.I... A doubling in RT over the RDNA4 parts would be entirely what I would expect for next-gen UDNA GPU hardware... Especially if AMD -finally- re-aligns how many ray accelerators they have in their parts.
| curl-6 said: If it pans out that would be cool, I'm just sceptical for the moment, as the last two gens were also promised to be the "biggest leap ever" yet diminishing returns were still a thing compared to prior gens. |
I am normally extremely skeptical of outlandish claims in the technology space.
However... I cannot understate how massive the potential next couple of years is going to be in regards to rendering technology is. - I haven't been this excited since we started to see programmable pixel shaders.
AMD and nVidia are investing 10's of Billions in A.I and RT stuff.
www.youtube.com/@Pemalite
