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

Saylick · Feb 24, 2025

gaav87 said:
Temps look good thou at 3.25g >330w
I imagine h++ will do 3.4 with golden 3.5

View attachment 118028

What... no way it's only sitting at 57C with that much juice. The benchmark must not be stressing the GPU all that much. I'll have to see it in a third-party review to believe it.

adroc_thurston · Feb 24, 2025

Saylick said:
What... no way it's only sitting at 57C with that much juice

330W isn't really all that much for modern 3 slot chunguses.

MrTeal · Feb 24, 2025

Saylick said:
What... no way it's only sitting at 57C with that much juice. The benchmark must not be stressing the GPU all that much. I'll have to see it in a third-party review to believe it.

From the 5070 Ti TPU reviews

Doesn't seem crazy out of line for a good air cooler.

gaav87 · Feb 24, 2025

SolidQ said:
yeah, maybe AMD surprpise us with GDDR7 version

Heard rumors about this today from chinese but not for 9070 not on chiphell other forum. But idk if true

Saylick said:
What... no way it's only sitting at 57C with that much juice. The benchmark must not be stressing the GPU all that much. I'll have to see it in a third-party review to believe it.

Its heaven benchmark on linux mesa hack and slash drivers so take it as it is.

SolidQ · Feb 24, 2025

gaav87 said:
Heard rumors about this today from chinese but not for 9070 not on chiphell other forum. But idk if true

you mean this? About 9080?

Saylick · Feb 24, 2025

adroc_thurston said:
330W isn't really all that much for modern 3 slot chunguses.

Shows how out of touch I am with the modern state of GPUs. I am still expecting 75C+ temps from 7-8 years ago when coolers weren’t ridiculously oversized.

adroc_thurston · Feb 24, 2025

Saylick said:
Shows how out of touch I am with the modern state of GPUs. I am still expecting 75C+ temps from 7-8 years ago when coolers weren’t ridiculously oversized.

It's kinda good tho. Lower temps mean less leakage.

Bryo4321 · Feb 24, 2025

SolidQ said:
you mean this? About 9080?

I’m not going to count on it but gosh I’d love to see it. Seems like it could be a high margin product. If it could compete with a 5080 it seems like an opportunity worth taking, no?

Mopetar · Feb 24, 2025

If it does support GDDR 7 memory you'd think they'd at least let AIBs who were willing source their own memory to pair with a top-end OC model. AMD would do well by both consumers and their board partners to let that happen.

Then again maybe it turns out similar to Blackwell where the added memory bandwidth doesn't do as much as one would typically assume and no one wants to pay for more expensive memory that adds very little performance.

linkgoron · Feb 24, 2025

Mopetar said:
If it does support GDDR 7 memory you'd think they'd at least let AIBs who were willing source their own memory to pair with a top-end OC model. AMD would do well by both consumers and their board partners to let that happen.

Then again maybe it turns out similar to Blackwell where the added memory bandwidth doesn't do as much as one would typically assume and no one wants to pay for more expensive memory that adds very little performance.

is there ANY reason to believe that RDNA4 supports GDDR7? It's unlike AMD to waste space and engineering on something like GDDR7 support.

adroc_thurston · Feb 24, 2025

Mopetar said:
If it does support GDDR 7 memory you'd think they'd at least let AIBs who were willing source their own memory to pair with a top-end OC model

Supports != they validated or designed a PCB for it.

linkgoron said:
It's unlike AMD to waste space and engineering on something like GDDR7 support.

wdym space and engineering.
memory IP is licensed from EDA vendors.

RnR_au · Feb 24, 2025

linkgoron said:
is there ANY reason to believe that RDNA4 supports GDDR7? It's unlike AMD to waste space and engineering on something like GDDR7 support.

DDR7 makes sense on a 32GB Pro card.

branch_suggestion · Feb 24, 2025

You know, a super funny thing would be porting N48 to N3P, with 3GB GDDR7 dies.
Probably not worth as it would have at best a year before RDNA5 comes out, but it would counter NV's refresh.

blckgrffn · Feb 24, 2025

branch_suggestion said:
You know, a super funny thing would be porting N48 to N3P, with 3GB GDDR7 dies.
Probably not worth as it would have at best a year before RDNA5 comes out, but it would counter NV's refresh.

I think at best we see the 24GB GDDR7 part.

It be kind of nuts to thinks AMD has been sitting on their hand for like 2+ months when they realized their competition was tripping hard this gen. They have to have ability to do something.

A 400W version of this primed for the 3GB ddr7 availability seems like a clutch pull they could make if they had started the work asap. You know with the validation and all that. Even 16GB GDDr7 for a refresh/XTX model asap seems like… doable?

adroc_thurston · Feb 24, 2025

blckgrffn said:
They have to have ability to do something.

nope.
It's a doomed generation from AMD and there's nothing they can do.

blckgrffn said:
A 400W version of this primed for the 3GB ddr7 availability seems like a clutch pull they could make

funny but useless.

Win2012R2 · Feb 24, 2025

blckgrffn said:
They have to have ability to do something.

The best thing they can do now is accelerate RDNA5/UDNA as much as possible and get bloody ambitious this time!

adroc_thurston · Feb 24, 2025

Win2012R2 said:
The best thing they can do now is accelerate RDNA5/UDNA as much as possible and get bloody ambitious this time!

no one ever accelerates an irrelevant product.
Ambition isn't allowed either.

poke01 · Feb 24, 2025

adroc_thurston said:
no one ever accelerates an irrelevant product.

isn't RDNA5 for consoles seems pretty relevant to me

adroc_thurston · Feb 24, 2025

poke01 said:
isn't RDNA5 for consoles seems pretty relevant to me

These are later than the DT thingy.

tsamolotoff · Feb 25, 2025

According to some people, you can already buy 9070xt in Moldova of all places, maybe there are non-risk averse people who want to travel there and get one (albeit no drivers yet)

dice66 · Feb 25, 2025

Yes, but the site looks shady and there is no info if it's actually available.
On top of that the price ends up at ~1250 USD

ToTTenTranz · Feb 25, 2025

dice66 said:
View attachment 118074

Yes, but the site looks shady and there is no info if it's actually available.
On top of that the price ends up at ~1250 USD

It's a placeholder.

My bet is AMD themselves will decide on the price at the last minute, and all the price points we've seen so far are values they considered at some point.

Perhaps that "7900 GRE + 43%" marketing material we've seen so far is the best indicator of the final price we got, because it means that value left the internal discussions and went on to the people doing marketing material.

branch_suggestion · Feb 25, 2025

https://videocardz.com/newz/amd-teases-radeon-rx-9070-focusing-on-sub-700-price-point

This basically puts the price ceiling at $649.

leoneazzurro · Feb 25, 2025

branch_suggestion said:
https://videocardz.com/newz/amd-teases-radeon-rx-9070-focusing-on-sub-700-price-point
This basically puts the price ceiling at $649.

699$ is also under 700$, mathematecally speaking.

marees · Feb 25, 2025

leoneazzurro said:
699$ is also under 700$, mathematecally speaking.

Og launch (july 23) price of 7900gre was $649. It got reduced to $549 for global launch in 2024

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