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

Joe NYC · Jun 2, 2024

Abwx said:
AMD just confirmed these days 4bn $ shipment of MI300 for 2024, given the current AI frenzy they can easily double this number in 2025 if they have some technical advantage, that would surpass their servers or CPU client sales within 2 years.

Guess that s where they ll put their priorities, gaming GPUs will get the minimalist treatment with mid range products that cover 80% of the market, not a bad strategy after all.

AMD just keeps growing the portfolio of products, spending money on their development and introduces them to market.

While other companies either stopped hiring or had rounds of layoffs, AMD just kept on going at the steady pace, not wavering.

The past and upcoming cycles of client GPUs did not hit it out of the ballpark, but AMD is still the only company that can compete and possibly out compete NVidia. And AMD is working on exactly that.

adroc_thurston · Jun 2, 2024

Joe NYC said:
While other companies either stopped hiring or had rounds of layoffs, AMD just kept on going at the steady pace, not wavering.

It's them and NV, yeah.
Big lmao, really.

Joe NYC said:
The past and upcoming cycles of client GPUs did not hit it out of the ballpark, but AMD is still the only company that can compete and possibly out compete NVidia. And AMD is working on exactly that.

Yeah, there's a good reason NV treats AMD with extreme caution.

BurnItDwn · Jun 2, 2024

Hoping for some tidbits of info on RDNA 4 during computex. Not expecting anything solid before Q4, but im cautiously optimistic.
I've got a 6800, the 7900 GRE has tempted me, but, i've been able to restrain myself thinking RDNA 4 will likely give a little more bang for the buck when it happens.
I dont need an upgrade for my main PC, but, my wife's using my old GPU and she wants the 6800 for her PC.

Side note: Wild Turkey 101 rye .., good, bang for buck
Highland Park 12 year Scotch ... amazing amazing amazing.

Tuna-Fish · Jun 2, 2024

Not even a "just one more thing" mention in the end for RDNA4. If AMD was launching them this year, I'd have expected a nod.

dhruvdh · Jun 2, 2024

Computex being an industry event, I think for the industry Radeon is the least interesting product line from AMD currently.

soresu · Jun 2, 2024

Tuna-Fish said:
Not even a "just one more thing" mention in the end for RDNA4. If AMD was launching them this year, I'd have expected a nod.

I think the embarrassment of doing another Polaris/RDNA1 type generation probably led them to distance the RDNA4 announcements from everything else.

branch_suggestion · Jun 2, 2024

Yeah good old SIGGRAPH and Gamescom will deal with it.
RDNA3.5 looks tidy, about where it was expected.

marees · Jun 3, 2024

branch_suggestion said:
Yeah good old SIGGRAPH and Gamescom will deal with it.
RDNA3.5 looks tidy, about where it was expected.

So not launching before September this year (if launching this year)

branch_suggestion · Jun 3, 2024

marees said:
So not launching before September this year (if launching this year)

Basically a year after N32, still gives a good headstart vs direct comp.

marees · Jun 3, 2024

branch_suggestion said:
Basically a year after N32, still gives a good headstart vs direct comp.

Going by the rumours the performance of navi 44 & navi 48 will sandwich N32

AMD doesn’t even need a cut down 12gb navi 48. The 7700xt does the job at $350

adroc_thurston · Jun 3, 2024

marees said:
AMD doesn’t even need a cut down 12gb navi 48. The 7700xt does the job at $350

PPA.
N4M's are cheaper, simpler parts.

SolidQ · Jun 3, 2024

marees said:
The 7700xt does the job at $350

RT perfomance also difference.
Seems they left RDNA4 for Gamescon

jpiniero · Jun 3, 2024

marees said:
The 7700xt does the job at $350

It's been that cheap but currently is $399 it seems.

Mopetar · Jun 3, 2024

soresu said:
I think the embarrassment of doing another Polaris/RDNA1 type generation probably led them to distance the RDNA4 announcements from everything else.

Or they've still got a lot of RDNA2/3 stock they want to get through. No sense in announcing anything that's still months away that might hurts current sales.

gdansk · Jun 3, 2024

Lisa Su didn't tag it on her tweet so that's not surprising.
No point announcing something 6 months early.

Mahboi · Jun 3, 2024

soresu said:
I think the embarrassment of doing another Polaris/RDNA1 type generation probably led them to distance the RDNA4 announcements from everything else.

No, they just had too much to present, end of it.
People who project their desires onto AMD are totally inventing this. At no point whatsoever RDNA 4 was on the menu for Computex. I've only seen people hopium about it here.

inquiss · Jun 3, 2024

adroc_thurston said:
so true.

GPGPU stuff does not really directly affect client gfx roadmap.

Maybe. Though I exp CT it wasn't the main reason bigger Navi parts were cancelled this gen, if they needed to use any fancy packaging capacity that's better used on higher margin products I can see that factoring into the decision too

soresu · Jun 3, 2024

Mahboi said:
I've only seen people hopium about it here

Speculation has been pretty wide from what I have seen - it's wide because they have left little solid to comment on, even less than with Zen5.

soresu · Jun 3, 2024

inquiss said:
Maybe. Though I exp CT it wasn't the main reason bigger Navi parts were cancelled this gen, if they needed to use any fancy packaging capacity that's better used on higher margin products I can see that factoring into the decision too

Exact same reason we don't see HBM in consumer gfx since Vega.

Too little capacity and so much demand for it in the higher margin markets.

adroc_thurston · Jun 3, 2024

soresu said:
Too little capacity and so much demand for it in the higher margin markets.

It's just too expensive for client parts.
Plus, they can cope with LLCs.

KompuKare · Jun 4, 2024

Abwx said:
They share the underlying designs, they use the same ALUs FI, it s what is around that is adapted to the different tasks, FI rendering back end/GDDR controler for client and HBM controler for GPGPU that do not need the rendering part.

As well as the packaging constraints others have noted, tape out / testing / etc. resources are finite so I would expect gaming GPUs to be at the back of the queue anyhow.

adroc_thurston · Jun 4, 2024

KompuKare said:
As well as the packaging constraints others have noted

There are none.

Kepler_L2 · Jun 4, 2024

Oof

https://twitter.com/x/status/1798062738322919911

CouncilorIrissa · Jun 4, 2024

Kepler_L2 said:
Oof
https://twitter.com/x/status/1798062738322919911

Execution hasn't been a thing at Radeon recently.

How does one cancel everything that was complex about the lineup and still end up delaying everything.

RDOA4 indeed.

Mahboi · Jun 4, 2024

I was not reacting because I assumed it was just Wccftech being itself.
If true, holy heck AMD deserves every bit of hate they've been getting.

Discussion RDNA4 + CDNA3 Architectures Thread

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