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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 forums.anandtech.com
 
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Is that for real? Another 6500XT
3efae6ec34d4f324f0eb933fd8e5a87b.png
 
It absolutely can be an issue even when you have an integrated GPU with encode support, local streaming is a thing, at the moment you cannot use the iGPU to encode while using the discrete GPU for gaming on the host with Moonlight and Sunshine.
AMD is just a disaster on GPU man
 
I still think that AMD needed a card to fight toe-to-toe with the Nvidia halo card. At least amd maximum 4k performance. 8k is for the riches.
 
RNR_Forte said:
I still think that AMD needed a card to fight toe-to-toe with the Nvidia halo card. At least amd maximum 4k performance. 8k is for the riches.
Click to expand...

I think they tried to do that but failed, I mean the chiplet strategy, they are probably lying about focusing on the midrange as an overall planned strategy for a long time and instead they are just forced to do so after they plan about competing with chiplets failed.
 
marees said:
AMD should have lied that msrp of 6500xt is $99

Crazy to launch at a price for which it actually sold on the market
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Yeah, that would have helped with the reception a lot. Though it's still a bad graphics card. It has issues at 1080p medium in some games.
 
GTracing said:
To be fair, the main issues with the 6500XT were the 4GB VRAM, the four PCIe lanes, and the price. The missing encode/decode engine was just the cherry on top.
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-It was really all the 4gb RAM. There is an 8gb from Sapphire that runs fine for the specs, sometimes twice as fast as the stock version.

That card couldn't exist at launch though thanks to mining, the 8gb of Vram would have sent the price and the card would probably have ended up in the mines with 8gb of RAM and a lean power profile.

No reason we couldn't get that card today though.

I'd love to see a 24 CU 8GB clocked to the moon entry level card for $100-120. It would sell like hotcakes.
 
Meteor Late said:
I think they tried to do that but failed, I mean the chiplet strategy, they are probably lying about focusing on the midrange as an overall planned strategy for a long time and instead they are just forced to do so after they plan about competing with chiplets failed.
Click to expand...

The only time that they really tryed to do this was with the HD 2900 xt back in 2006.
 
GodisanAtheist said:
-It was really all the 4gb RAM. There is an 8gb from Sapphire that runs fine for the specs, sometimes twice as fast as the stock version.

That card couldn't exist at launch though thanks to mining, the 8gb of Vram would have sent the price and the card would probably have ended up in the mines with 8gb of RAM and a lean power profile.

No reason we couldn't get that card today though.

I'd love to see a 24 CU 8GB clocked to the moon entry level card for $100-120. It would sell like hotcakes.
Click to expand...
A wider PCIe bus also would have increased performance. The combination of the two were what caused the terrible performance on the 6500 XT.

The fact is, you can't compromise on both VRAM capacity and PCIe bandwidth. To a degree you can get away with handicapping one or the other, but doing both is disastrous for performance. It also creates a situation where the 6500 XT is overly sensitive to exceeding the VRAM buffer, even by a little bit, whereas products such as the GTX 1650 Super have a lot more leeway.
Click to expand...
www.techspot.com

AMD Radeon RX 6500 XT Review: A Bad, Really Bad Graphics Card

How to start this review... this thing is so bad, it's really spoiled the mood for me. In short, this is the worst GPU release since I...
www.techspot.com www.techspot.com
 
adroc_thurston said:
Intel is too poor and QC too incompetent. 0/2.
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But them it wouldn't be "my team" embarrassing itself.
Yes, I know it's an irrational feeling, it's like football teams, I can't help it since I "discovered" myself on the side of AMD back in the mid 1990.

If AMD really gave up them give up for real.
Stick doing "gaming" GPUs only for the IGPs, and at most launch only one or two discrete GPUs for generation. One the "sweet spot" mainstream and the other the low-end for old PCs. If they don't believe they can make real money to be truly competitive, or do something like this or cut their losses on exiting this market.
 
Panino Manino said:
exiting this market.
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Full exit is always too expensive to pull off.
Panino Manino said:
Stick doing "gaming" GPUs only for the IGPs, and at most launch only one or two discrete GPUs for generation. One the "sweet spot" mainstream and the other the low-end for old PCs
Click to expand...
well they're making three, one for the poor people, one for the middle class, and a kilobuck offering on top of these. But no halo or any fancy chiplet wondertech devices.
 
SolidQ said:
Is that for real? Another 6500XT
3efae6ec34d4f324f0eb933fd8e5a87b.png
Click to expand...
No, that's a good idea. Media engines take donkeyloads of die space and what use are they, really? Quality encoding needs to be done through software encoders, game streaming and game recording belongs on the CPU's integrated media engine because it's more efficient there.

It's inefficient to pay for the media engine footprint twice, and most AM5 CPUs have media engine (iGPU) now (the main exception is 7500F, with 8700F and 8400F in tow but those don't sell that much I think).

So this is 100% a smart thing to do. PCIe ×8 interfaces, too.

(But it probably will be used against AMD in the guerrilla marketing / volunteer shilling comments that tell you how paying more for the same performance on Nvidia cards is "the more you save", Huang math or something.)
 
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