Discussion RDNA4 + CDNA3 Architectures Thread

[DisEnchantment]

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

 

[Thunder 57]

Mindfactory. Seems a lot 6800 still..

If 8600XT with 12GB for 300-330 with same perf as 6800. Would be nice.

P.S Gonna be interesting how people react, if AMD gonna sell 8700 non XT for 400$ with much better RT than 7800XT

I was looking at 7700 XT's last night. Then I saw, why bother? The 7800 XT is not much more and then I saw the vanillia 6800. I'm not really looking to buy but a 6800 is attractive at its price. If only Anandtech still reviewed GPU's.

 

[igor_kavinski]

The 7800 XT is not much more and then I saw the vanillia 6800. I'm not really looking to buy but a 6800 is attractive at its price.

For me the 7900 GRE is a no-brainer coz it's so close to the 7800 XT where I live (Abu Dhabi). I think the shopkeepers decided to use their super brains and figured that since 7900 GRE is the Chinese edition, it must be inferior compared to the 7800 XT so not charging a premium for that.

But at this point, I would wait a few months for RDNA4 unless I find RDNA3 at HALF price

 

[Tup3x]

Yeah except when their "best" product malfunctions (like some repair shops getting 200 4090s to repair per month). But people who want bragging rights appear to put themselves through any suffering.

Yeah, well, and none of those Radeons have hot spot issues...

 

[igor_kavinski]

Yeah, well, and none of those Radeons have hot spot issues...

It was a limited initial run of 7900 XTX cards. You don't see a thread on these forums where Radeon users are complaining about hotspots, do you? But the 12VHPWR connector fiasco threads are here, two at least I think.

 

[Shmee]

Are you referring to the QC issue with some of the reference coolers? That issue didn't even affect any cards with non reference coolers. But yes, there were some early 7900XTX reference batches that had an issue with the vapor chamber I believe.

 

[Mahboi]

Yeah, well, and none of those Radeons have hot spot issues...

None of them do indeed. You just walked into the Nvidia FUD.

 

[static shock]

5090 killer this time AMD.
My and a ton of red gamers want!

 

[adroc_thurston]

a ton of red gamers want!

Don't exist.

5090 killer this time AMD.

That's a long wait.

 

[SolidQ]

That's a long wait.

isn't RDNA5 is going vs 6090?

 

[adroc_thurston]

isn't RDNA5 is going vs 6090?

A bit earlier, AMD and NV schedules do not overlap.

 

[SolidQ]

AMD and NV schedules do not overlap.

They was like a same time with 1-2 month difference, now more difference?
RDNA5 gonna out earlier like HD7xxx series, then NV competition 6090?

 

[adroc_thurston]

They was like a same time with 1-2 month difference, now more difference?

No?
RDNA1 aligned itself to no NV product and 3 is just a coincedence.
Neither did Vega, really.

 

[SolidQ]

RDNA1 aligned itself to no NV product and 3 is just a coincedence.

Ok looks like Spring 2026 RDNA5, autumn RTX 6090

The 7800 XT is not much more and then I saw the vanillia 6800.

Yeah 6800 now have good price. Anyway AMD should be do N44 10GB card like for 230, and that would be nice upgrade to RX580/1650/1060/1660 users, but we have 8gb version...

 

[adroc_thurston]

Ok looks like Spring 2026 RDNA5, autumn RTX 6090

Hopefully?

 

[SolidQ]

Hopefully?

who know...

 

[Panino Manino]

Before, people "hoped" that the new AMD card with the next generation architecture would compete with Nvidia's best for the top.
Now people are "hoping" that that in the generation after that AMD will decide to compete with Nvidia's best for the top.

 

[Tup3x]

Are you referring to the QC issue with some of the reference coolers? That issue didn't even affect any cards with non reference coolers. But yes, there were some early 7900XTX reference batches that had an issue with the vapor chamber I believe.

No, third party coolers. Pump out effect can happen after few months and hot spot temps start to climb. At worst it leads to throttling and noisy cooler.

 

[marees]

Before, people "hoped" that the new AMD card with the next generation architecture would compete with Nvidia's best for the top.
Now people are "hoping" that that in the generation after that AMD will decide to compete with Nvidia's best for the top.

In times of ATI, there used to be the x990 cards that had more power than a single Nvidia card. Microstutter killed it. If AMD cracks this problem with RDNA 5 then you might get big $$$$ AMD cards. Else the wait will continue to RDNA 6 or beyond

 

[igor_kavinski]

No, third party coolers. Pump out effect can happen after few months and hot spot temps start to climb. At worst it leads to throttling and noisy cooler.

OK, I guess that's a fair point. Do AIBs spend more on cooling solutions for Geforce cards so it doesn't happen there?

 

[igor_kavinski]

By the way, people getting the 4060 in droves coz 4090 is the current fastest consumer card, makes absolutely no sense to me. It's like getting a Mac Mini coz Apple is topping the Geekbench ST charts at the moment. Yeah, great job folks. Now suffer the VRAM inadequacy on the former and literally nothing much to do other than basic stuff on the latter.

 

[adroc_thurston]

By the way, people getting the 4060 in droves coz 4090 is the current fastest consumer card, makes absolutely no sense to me. It's like getting a Mac Mini coz Apple is topping the Geekbench ST charts at the moment. Yeah, great job folks. Now suffer the VRAM inadequacy on the former and literally nothing much to do other than basic stuff on the latter.

the shills.
Shill Foundry etc.

 

[gdansk]

I don't want to be too negative but the RX 7600 not being good and only $30 less right now has to bear some of the blame too.

 

[Mahboi]

the shills.
Shill Foundry etc.

What's the podium behind Shill Foundry?
N°2, N°3?
My vote goes for Tim from HWUB as at least top 5.

 

[adroc_thurston]

I don't want to be too negative but the RX 7600 not being good and only $30 less right now has to bear some of the blame too.

Not the relevant segment of the market anymore, ASPs crawled up some time ago.

 

[SolidQ]

Not the relevant segment of the market anymore,

how about this "Not relevant"? Under 35% and 150-300$ price