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Discussion RDNA4 + CDNA3 Architectures Thread

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DisEnchantment

DisEnchantment

Golden Member
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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
github.com

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 github.com
Or Phoronix

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

www.phoronix.com 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 :grimacing:

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

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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
 
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SolidQ said:
F1 2024 1% is good in RT mode
Click to expand...
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.
www.pcgameshardware.de

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

Fortsetzung des Artikels „AMD Radeon RX 9070 & RX 9070 XT mit RDNA 4 im Test: Eine faustdicke Überraschung!“ – Auf Seite 3: Spiele-Benchmarks & Leistungsindex
www.pcgameshardware.de www.pcgameshardware.de
 
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Overall between cnn and transformer mode
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Perfomance hit
Screenshot-20250305-144922-Edge.jpg
 
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.
Click to expand...
They could just dial down the clocks and it would have been fine.
 
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.
Click to expand...
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.
 
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 said:
Actually manage the supply so that they don't have to cut prices. They want you to buy the XT.
Click to expand...

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.
 
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.
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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.
Click to expand...
It's not something they wanna sell.
 
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