AMD: RDNA 3 Speculation, Rumours and Discussion

Games will be mostly CPU limited in anything lower than 4K. But that's hardly new, 1024x768 was "high resolution" some time ago.

 

NV is ahead in the ray tracing game, it has nothing to do with conspiracy or them 'fiddling with developer input'. Their hardware is better specced, not just in ray tracing but reconstruction and compute aswell.

 

I can imagine AMD has variations on traversal. E.g. a shadow ray needs no front to back order of visiting childrens, then there are variants with short stack, or stackless (would need extra pointer in BVH), etc.
So they might at least test big AAA games and select the fastest variant.
Really not sure if additional patching in ISA from custom shaders made for console would fit into such worklfow. Likely not. May depend on other low level console extensions. (Edit: or just overall differences to console implementation so custom traversal alone would break)

Yes, but i think he meant it the other way around: 4K is too high, so CPU can't deliver, and thus monster GPU is pointless. Which does not make much sense to me.

 

CP2077 runs at less than 30 fps @ 4K with all bells and whistles on (including all the RT gimmicks), so I don't see why anyone would be against getting a GPU that will allow you to play with smooth 120 fps without an IQ degrading crutch

 

But do those 30 fps come from CPU limit? Why? CPU involved in building BVH?

 

I for sure could make use of some 2x-3x graphics performance. There's also DRS/VRS for folks who don't want to buy into larger, higher res displays to easily burn GPU cycles and get better images in return.

 

Yeah I certainly have no concerns about using up that much performance. Cyberpunk at 4K with Ultra RT gets you 11fps on a 6900XT for example. So even on this new monster it would still be unplayable at that resolution without some upscaling in play.

This is an extreme case but there will be other similar situations where RT is involved. And then as you say, 120fps at 4K (even upscaled) requires much more than what todays top end GPU's can output in many titles.



https://www.kitguru.net/gaming/dominic-moass/cyberpunk-2077-ray-tracing-on-amd-gpus-benchmarked/

 

I sure as hell wouldnt say the PS5 is 'too powerfull', if i want to play rift apart at the performance rt mode, my resolution gets dropped to anywhere between 1080p and 1440p, along with reduced fidelity. And thats for a game that really looks amazing, up there with the best, but it aint that large of a leap coming from the best PS4 had to offer in the end. The game's lacking a dynamic GI, water looks.... ye, and theres one ray tracing effect.

Thats if we assume AMD manages to go another GPU generation without dedicated hardware support for ray tracing, which i cant imagine they will.

 

Yes fingers crossed that if the 2.7x raster performance is real, it translates into something bigger for RT.

 

It would be quite pointless to invest all monster power into just compensating RT shortcomings.
So that remains the price question. Otherwise so far it looks like a killer arch.

 

What kind of spin is this?

 

RDNA2 copium still lingers on harshly.

 

They already have hardware RT... I guess they will try to accelerate more "stages" in the futur for sure, but saying they don't have hardware RT is wrong.

 

Ye i dunno what their planning, just increasing the compute by say 3 times, thats impressive, but if the competition's doing that aswell + dedicated hardware rt, it would be the same situation as today, which is kinda boring i think.

Fully agree, thats why i wrote dedicated.

 

nope

 

And you know that because?

 

144SM clocked to hell is not quite 240SM.
But maybe that's just me.

 

You mean put the Ray Accelerators outside the CU ? My take is they can beef the RA, and still having them in the CUs. It's still dedicated hardware.

 

I dont care how they do it, aslong as they drive up competition which hopefully both drives prices down aswell as more pressure in the market to innovate and generally even larger leaps in performance.
Maybe that happens when Apple joins the game dunno.