Discussion RDNA4 + CDNA3 Architectures Thread

DisEnchantment · Mar 23, 2022

With the GFX940 patches in full swing since first week of March, it is looking like MI300 is not far in the distant future!
Usually AMD takes around 3Qs to get the support in LLVM and amdgpu. Lately, since RDNA2 the window they push to add support for new devices is much reduced to prevent leaks.
But looking at the flurry of code in LLVM, it is a lot of commits. Maybe because US Govt is starting to prepare the SW environment for El Capitan (Maybe to avoid slow bring up situation like Frontier for example)

See here for the GFX940 specific commits

History for llvm/lib/Target/AMDGPU - llvm/llvm-project

The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. - History for llvm/lib/Target/AMDGPU - llvm/llvm-project

github.com

Or Phoronix

More AMD "GFX940" Enablement Work Landing In LLVM - Phoronix

www.phoronix.com

There is a lot more if you know whom to follow in LLVM review chains (before getting merged to github), but I am not going to link AMD employees.

I am starting to think MI300 will launch around the same time like Hopper probably only a couple of months later!
Although I believe Hopper had problems not having a host CPU capable of doing PCIe 5 in the very near future therefore it might have gotten pushed back a bit until SPR and Genoa arrives later in 2022.
If PVC slips again I believe MI300 could launch before it

This is nuts, MI100/200/300 cadence is impressive.

Previous thread on CDNA2 and RDNA3 here

Question - Speculation: RDNA3 + CDNA2 Architectures Thread

Man I have been dying to make this one for a while now. First rumours for RDNA3 are here so new thread time! Just going to start off with this one for now: kopite7kimi on Twitter: "@VideoCardz Ah, I mean a simple mcm design with 10240 cores is not enough. Because the lift from RDNA2 to RDNA3...

forums.anandtech.com

coercitiv · Mar 5, 2025

Steve is sitting down, finally

The other Steve is also smiling

Hitman928 · Mar 5, 2025

Doesn't quite live up to the hype but still a solid generation upgrade for AMD. Pricing at $599 seems spot on. They can "win" with supply to keep the scalping limited.

sl0519 · Mar 5, 2025

inquiss said:
Nah, the xt is the non cut down product. So you've got this backwards. They'll have loads more xt than non xt

I meant the non-XT should stay where it is, while the XT version should have a much higher CU count but be downclocked instead. They are obviously clocking the XT to the moon which tanks the efficiency completely.

StinkyPinky · Mar 5, 2025

Is this the Ryzen of graphics cards? Man I hope so.

PJVol · Mar 5, 2025

SolidQ said:
F1 2024 1% is good in RT mode

From another great review website from Germany,
RX 9070XTX (yes, why not?) almost at 5080 and 5070 ti level performance (non-RT/RT). I think good-old EK water block would just nail it.

Radeon RX 9070 XT und 9070 im Test: AMD sprengt die Erwartungen!

Spiele-Benchmarks & Leistungsindex

www.pcgameshardware.de

SolidQ · Mar 5, 2025

Overall between cnn and transformer mode

Perfomance hit

adroc_thurston · Mar 5, 2025

PJVol said:
From another great review website from Germany,
RX 9070XTX is basically at 5080 and 5070 ti level performance (non-RT/RT)

Radeon RX 9070 XT und 9070 im Test: AMD sprengt die Erwartungen!

Spiele-Benchmarks & Leistungsindex

www.pcgameshardware.de

Man it really does run out of membw half the time. Impressive.

coercitiv · Mar 5, 2025

Clocks, temps and fan speeds on various 9070 XT models from the HUB review

Mahboi · Mar 5, 2025

Random thought: I think the power efficiency on the cards tells a lot as to why AMD gave up on the high end. If one 9070 XT is barely able to get close to a 4080, I doubt that chiplets stacked together into 120 CUs would have done great.

Elfear · Mar 5, 2025

Any idea when they go on sale?

jpiniero · Mar 5, 2025

Elfear said:
Any idea when they go on sale?

Tommorrow

Heartbreaker · Mar 5, 2025

jpiniero said:
Don't need to. Just as long as they manage supply appropriately.

What does that mean, only supply enough for dummies who don't understand what a poor value it is? AMD jebaiting at it's finest.

adroc_thurston · Mar 5, 2025

Mahboi said:
I doubt that chiplets stacked together into 120 CUs would have done great.

Yeah they would.

SolidQ · Mar 5, 2025

PJVol said:
RX 9070XTX is almost at 5080 and 5070 ti level performance

Dying light + 10 for XTx compared to XT

branch_suggestion · Mar 5, 2025

sl0519 said:
I meant the non-XT should stay where it is, while the XT version should have a much higher CU count but be downclocked instead. They are obviously clocking the XT to the moon which tanks the efficiency completely.

That requires a bigger die than what exists.

exquisitechar · Mar 5, 2025

Mahboi said:
Random thought: I think the power efficiency on the cards tells a lot as to why AMD gave up on the high end. If one 9070 XT is barely able to get close to a 4080, I doubt that chiplets stacked together into 120 CUs would have done great.

They could just dial down the clocks and it would have been fine.

GTracing · Mar 5, 2025

sl0519 said:
It seems that the 9070 is being overlooked. It should've been the real star of the RDNA4 lineup. I assume AMD’s original plan was to position the 9070 to match the performance of the RX 7900 XT, but they somehow managed to push the clocks higher, bringing it closer to the RX 7900 XTX. As a result, they decided to introduce an additional SKU (9070XT). Based on TPU’s review, the 9070's efficiency is roughly on par with the RTX 5070 Ti, which suggests that the 9070 XT is clocked excessively high, leading to a significant drop in efficiency. A better approach would have been to increase the number of CUs while reducing clock speeds to maintain a more balanced power-to-performance ratio.

Keep in mind that a lot of the cards given to reviewers are factory overclocked. Most of the models sold will have a more sane power limit. For example, TechPowerUp has a Sapphire Nitro which draws 350W. Whereas PCGamesHardware has a Sapphire Pulse which draws 310W.

Heartbreaker · Mar 5, 2025

StinkyPinky said:
Is this the Ryzen of graphics cards? Man I hope so.

Not nearly. Price is really the only win. They still a step behind in RT and AI scaling.

coercitiv · Mar 5, 2025

Why are there quite a number of instances where the 9070 XT performs relatively better against other GPUs at 4K than it does at 1440p?

jpiniero · Mar 5, 2025

Heartbreaker said:
What does that mean, only supply enough for dummies who don't understand what a poor value it is? AMD jebaiting at it's finest.

Actually manage the supply so that they don't have to cut prices. They want you to buy the XT.

marees · Mar 5, 2025

MLID claim: official MSRPs will rise after 1 month

Retailers claim they can't buy AMD RX 9070 series GPUs at MSRP - OC3D

Retailers are unable to purchase Radeon RX 9070 series GPUs at AMD's MSRP price. Is AMD's MSRP real?

overclock3d.net

jpiniero · Mar 5, 2025

marees said:
MLID claim: official MSRPs will rise after 1 month

Retailers claim they can't buy AMD RX 9070 series GPUs at MSRP - OC3D

Retailers are unable to purchase Radeon RX 9070 series GPUs at AMD's MSRP price. Is AMD's MSRP real?

overclock3d.net

Not surprised. Definately if you are on the fence, buy now.

Heartbreaker · Mar 5, 2025

jpiniero said:
Actually manage the supply so that they don't have to cut prices. They want you to buy the XT.

Again, that's doesn't make 9070 a good product. Having a product exist only to act as a poor value, to make another product in your lineup look better in comparison is just dumb.

This is the third time in a Row AMD has done this, and they ended up with terrible reviews for those products, only to cave and lower the price after the damage was done.

9070 pricing is mainly a gift for NVidia.

adroc_thurston · Mar 5, 2025

Heartbreaker said:
Having a product exist only to act as a poor value, to make another product in your lineup look better in comparison is just dumb.

No it's good.

Heartbreaker said:
This is the third time in a Row AMD has done, this and they ended up with terrible reviews for that product, only to cave and lower the price after the damage was done.

9070 pricing is mainly a gift for NVidia.

It's not something they wanna sell.

Bigos · Mar 5, 2025

Heartbreaker said:
Not nearly. Price is really the only win. They still a step behind in RT and AI scaling.

Well, isn't price the most important factor though? Next to availability that we will soon see.

Discussion RDNA4 + CDNA3 Architectures Thread

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