Discussion RDNA4 + CDNA3 Architectures Thread

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DisEnchantment

Golden Member
Mar 3, 2017
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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
Or Phoronix

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

 
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jpiniero

Lifer
Oct 1, 2010
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An 8GB 128bit card at that price point though will be absolutely destroyed because Aussie Steve will throw out an Indiana Jones at 1080p benchmark where the 12GB B580 is playable and the 8GB 9060 either does not load the game at all or is in the single digits.

Consider that marketing to encourage people to buy the 16.
 

maddie

Diamond Member
Jul 18, 2010
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I doubt they will do an 8GB SKU at $199 though. The 16GB SKU if it performs around the 7700XT / 6800 / 4070 would make a great card at $330 and it would be a direct replacement for the 7600XT.

The next step down below $330 is around $250 and as you say at that price point 12GB is a requirement.

Given the size of N44 I don't see yields being so bad that there is room for more than 2 SKUs.

So yea. If I was AMD 12GB 96bit @ $250 and it should roughly match the B580 which was well received and not have the driver overhead issue. That would be a winner.

An 8GB 128bit card at that price point though will be absolutely destroyed because Aussie Steve will throw out an Indiana Jones at 1080p benchmark where the 12GB B580 is playable and the 8GB 9060 either does not load the game at all or is in the single digits.
As another member suggested, keep producing the 8GB RX 6600 models on 6nm for the lowest end.
 

Ghostsonplanets

Senior member
Mar 1, 2024
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I assume the MSRP will be higher than the 7600 / XT was (which was $269 for the 8 and $329 for 16).
That's DOA for the 8GB model. Would be absolutely blasted by media.
So yea. If I was AMD 12GB 96bit @ $250 and it should roughly match the B580 which was well received and not have the driver overhead issue. That would be a winner.
I agree. A 96-but 12GB $249 would be a winner. Specially if it can match 6750XT/6700XT
An 8GB 128bit card at that price point though will be absolutely destroyed because Aussie Steve will throw out an Indiana Jones at 1080p benchmark where the 12GB B580 is playable and the 8GB 9060 either does not load the game at all or is in the single digits.
That's my thinking as well. 8GB VRAM would be destroyed by media. And upcoming mainstay benchmark titles like AC Shadows and Doom Dark Ages are requiring 8GB VRAM as minimum for 1080p Low settings.
N33 is on N6 as well so might as well just lower the price of the RX 7600 below $200 and that would do the same job.
I agree with this. N6 N33 should be plenty cheap to be made these days and AMD could afford a price drop on the 7600 to own the <$200 market.
 

Panino Manino

Senior member
Jan 28, 2017
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IT BEGINS!

 

GTracing

Senior member
Aug 6, 2021
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FSR4 tested by DF:



EDIT: FSR4 Performance is better than DLSS4 CNN but worse than DLSS4 Transformer.
It's definitely really good. A night and day difference compared to FSR3. Just to add context for those that don't watch the video, the image quality is better, but it's more computationally heavy (they compared FSR4 performance vs DLSS performance). Overall DLSS3.8 vs FSR4 trade blows.
 

sl0519

Member
Aug 10, 2024
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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.
 

inquiss

Senior member
Oct 13, 2010
336
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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.
Nah, the xt is the non cut down product. So you've got this backwards. They'll have loads more xt than non xt
 
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