Monday, July 22nd 2024
Several AMD RDNA 4 Architecture Ray Tracing Hardware Features Leaked
We've known since May that AMD is giving its next generation RDNA 4 graphics architecture a significant upgrade with ray tracing performance, and had some clue since then, that the company is working on putting more of the ray tracing workflow through dedicated, fixed function hardware, unburdening the shader engine further. Kepler_L2, a reliable source with GPU leaks sheds light on some of the many new hardware features AMD is introducing with RDNA 4 to better accelerate ray tracing, which should give its GPUs a reduced performance cost of having ray tracing enabled. Kepler_L2 believes that these hardware features should also make it to the GPU of the upcoming Sony PlayStation 5 Pro.
To begin with, the RDNA 4 ray accelerator introduces the new Double Ray Tracing Intersect Engine, which should at least mean a 100% ray intersection performance increase over RDNA 3, which in turn offered a 50% increase over that of RDNA 2. The new RT instance node transform instruction should improve the way the ray accelerators handle geometry. Some of the other features we have trouble describing include a 64-byte RT node, ray tracing tri-pair optimization, Change flags encoded in barycentrics to simplify detection of procedural nodes; improved BVH footprint (possibly memory footprint): and RT support for oriented bounding box and instance node intersection. AMD is expected to debut Radeon RX series gaming GPUs based on RDNA 4 in early 2025.
Sources:
Kepler_L2 (Twitter), VideoCardz
To begin with, the RDNA 4 ray accelerator introduces the new Double Ray Tracing Intersect Engine, which should at least mean a 100% ray intersection performance increase over RDNA 3, which in turn offered a 50% increase over that of RDNA 2. The new RT instance node transform instruction should improve the way the ray accelerators handle geometry. Some of the other features we have trouble describing include a 64-byte RT node, ray tracing tri-pair optimization, Change flags encoded in barycentrics to simplify detection of procedural nodes; improved BVH footprint (possibly memory footprint): and RT support for oriented bounding box and instance node intersection. AMD is expected to debut Radeon RX series gaming GPUs based on RDNA 4 in early 2025.
247 Comments on Several AMD RDNA 4 Architecture Ray Tracing Hardware Features Leaked
I mean look at this very thread, guy posted 2 images with no RT whatsoever and then a guy with an AMD logo jumped in to tell us how crap RT is cause there is no difference between the 2 images. LOL, you can't make this up. Because neither image has RT bro, lol.
Strange that for such a ray tracing mega fan you can't immediately tell what I am showing you. Now I wonder how this works for your run of the mill not very tech savy consumer and yeah, I am thinking brand matters a lot lol.
Asking me which one has RT implies one does btw. But why? You just said you tried it in Call of duty and you didn't see any difference. You didn't see any difference in those cyberpunk screenshots either. So RT is bad regardless of how many fps your card can get, why would that matter?
So no, you didn't make your point since I figured out neither has RT even though you implied one does as a trap.
So are you saying one of those images has RT? What is the point of not saying now that I gave you my answer, lol.
It's so obvious that you were wrong and having no RT / PT makes a huge difference, that's how I was able to tell. If your point was to show otherwise then you would actually have PT in one of those images :D :D :D
Its like alcohol or drugs. Your first high/trip is the best one, and all that comes after is just trying to achieve that same sense of 'wow' ; might occasionally, briefly, even achieve it but it will never truly beat that first experience. The edge is off and it wont come back. Addicts try to keep finding it nonetheless and lose themselves in their search. There is more to life though ;)
If I place that lens on RT, for myself, I just see yet another incremental, small improvement to graphics that never changes, makes or breaks the game underneath. Not worth chasing the drugs dealer for. Ill just enjoy a sunny afternoon with a two dollar craft beer instead and avoid the hangover. Because in the end that drugs dealer is the synonym for a commercial push so you can make another guy rich. He isnt doing it to make you feel better. Thats something you can only achieve yourself and doesnt require money.
If I'd shown you two images where in one the game is missing all of it's shading and then asked you "hey which has global illumination and which doesn't", my question would be pretty redundant because it's obvious the shading is missing in one of them, it's not obvious when RT missing. Some graphical effects are very obvious to the end user and some aren't, ray tracing falls in the latter category.
I also don't feel like your analogy is representing reality cause as of right now at least, it doesn't really cost more to go for the card with RT. That's the whole point. Also shouldn't your argument apply to upscaling as well? Cause you can't at the same time be against upscaling (cause it looks worse than native according to you) and on the other hand feel like graphics don't matter that much and so RT is kinda pointless.
I just don't get the sentiment around here (you can see it the last few pages) that everyone assumes that we buy nvidia cause fanboy or whatever. Every single person with a 4090, what card do you think they'd have if AMD made the fastest GPU's? Cause I can assure you, all of them would be rocking the AMD card. Im not confused, I just trust that you are not lying again (for the 2nd time) so I assume that when you say that one of them has RT you do mean it. Again, if I'd have to bet money i'd say neither do have RT, RT makes such a huge difference that i'd be able to tell if it's on. And you agree with the fact that anyone would be able to tell - that's why you posted 2 images with no RT, lol.
You are basically trying to convince me how bad smoking is by posting 2 lung CT scans of non smokers. You get the problem, right?
At the same time sure, I spent 100+ hours in Cyberpunk too but two thirds of that was without RT on a 1080 and the game isnt better in the last 33 hours with RT on a 7900XT. Graphics upgrade notwithstanding, the game underneath was already 'done' in the first two thirds of that time; even with better graphics I still focused on finding more 'game' within it but its still the same shooter in a halfway finished open world.
Nvidias RT push hasnt brought a single game further in terms of gameplay.
If this was so obvious it would have been the first thing you'd have said, so let's put this to rest dude and admit that it's not obvious.
Because it's obvious, right ? You do know what "obvious" means, correct ? If it takes you 2-3 tries and even then you have no reasoning behind your conclusion, except that it's just a hunch, then it's not very obvious, now is it ?
Turns out I can't tell the difference because there isn't any, neither has RT. Why do you keep at it? You tried to trick me by implying one has RT and it failed cause RT is so obvious, even at your low quality image anyone would be able to tell. That's exactly why you didn't post the one that has RT. If there was no difference then you'd post the PT one, but you didn't, cause there is. Period. I ain't coming back to that, go have the last word.