AMD RDNA3 Specifications Discussion Thread

[Soltan_G42]

It seems like 7900 XTX might be behind RTX 3090 Ti in heavy RT titles based on what we are seeing theoretically and on the perf slides?

Yeah the performance slides looked scary.
I'm crossing my fingers that it's not as bad as it looked.

 

[trinibwoy]

Thing is though the numbers don't add up for dedicated matrix math units like 512, 768 or 1024 ops/clock, they claim 2.7x faster AI and the gpu is 61 Tflops which is 2.7x 23Tflops (6900XT)? Looks like they're claiming shaders as AI accelerators

It’s not tensors but the way it was presented it does sound like dedicated hardware if some sort. Maybe it’s tensors just much narrower?

 

[Phantom88]

It seems like 7900 XTX might be behind RTX 3090 Ti in heavy RT titles based on what we are seeing theoretically and on the perf slides?

Oh no, it'll be behind a vanilla 3080 in heavy RT games. A very poor showing here. Looking at Cyberpunk's RT performance, a 3080TI is 85% faster than a 6900XT. So RDNA 3 getting 50% more RT performance ...

 

[Dictator]

Thing is though the numbers don't add up for dedicated matrix math units like 512, 768 or 1024 ops/clock, they claim 2.7x faster AI and the gpu is 61 Tflops which is 2.7x 23Tflops (6900XT)? Looks like they're claiming shaders as AI accelerators

Yeah they are not XMX or Tensor cores
Those have much larger Performance multipliers

 

[Digidi]

For me this card is not chiplet design. It is a normal GPU chip with special HBM and GDDR6....

 

[Phantom88]

Oh no, they're gonna gut ray tracing in every engine and game they partner with. Snowdrop engine, so Avatar, he mentions Splinter Cell remake.

 

[LordEC911]

Looks like they were targeting at least 60FPS at 4k w/ RT and FSR2.
Because FSR3 will double the FPS? So they can hit +120FPS.
Makes sense but seems a bit lacking.

 

[del42sa]

FSR 3.0 is true thing

 

[Dampf]

FRAME GENERATION HOLLLY SSHIIITTTTT

 

[BRiT]

This should go without saying, but I'm finding having to repeat this message when it never should have to be said in the first place.

Do not turn this thread into silly comparisons across different companies. This is a new technical thread so keep unwanted behaviors out of it. They will be met with escalated moderation actions.

 

[pTmdfx]

It’s not tensors but the way it was presented it does sound like dedicated hardware if some sort. Maybe it’s tensors just much narrower?

WMMA instructions. Given the small perf. multiplier, it is probably designed to run on and so reuse the same 32-wide SIMD ALUs (in particular their dot-product capabilities) as much as possible to do the job, eh.

 

[Bondrewd]

WMMA instructions. Given the small perf. multiplier, it is probably designed to run on and so reuse the same 32-wide SIMD ALUs (in particular their dot-product capabilities) as much as possible to do the job, eh.

Correct.
They just labeled it like that so people on plebbit stop throwing a shitfit over it having "no AI".

 

[pjbliverpool]

FRAME GENERATION HOLLLY SSHIIITTTTT

I'm not so sure. They seemed incredibly vague about what it actually is and they gave themselves more than a year to launch it. I wouldn't be surprised if this is little more than a concept at the moment because they just HAD to have some kind of response to DLSS3. But if felt extremely half hearted.

 

[LordEC911]

Oh no, they're gonna gut ray tracing in every engine and game they partner with. Snowdrop engine, so Avatar, he mentions Splinter Cell remake.

That Halo RT example was a weird choice to showcase... barely noticed an difference. Slightly brighter color/lighting on the armor and a darker but detailed shadow.

 

[Lurkmass]

There's not many options if any to overcome a 30% transistor deficit compared to the leading edge solution from the competitor ...

 

[madhatter]

RDNA3 is a huge disappointment. I was hoping for much more of an improvement to RT performance.

 

[Bondrewd]

I wouldn't be surprised if this is little more than a concept at the moment because they just HAD to have some kind of response to DLSS3

They had hardware interpolation engine for years before Navi.

 

[BRiT]

Hopefully the Hyper-RX is easy to implement and brings genuine latency improvements.

 

[Leoneazzurro5]

The media engine seems quite good, anyway.

 

[LordEC911]

The media engine seems quite good, anyway.

They bought Xilinx so they could catch up?