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

marees · Mar 6, 2025

moonbogg said:
how many of those people actually got a card though.

More than 500 in the queue were able to snag a MSRP 9070xt

terpsy said:
I was there at 9 am this morning (North Jersey Microcenter)

There were about 500-600 people in line in front of me at least.

It took about 70 minutes to finally be allowed into the store, and they had just sold out of the Sapphire 9070XT and were low stock on the other MSRP ($599) 90790XT's from Asus, ASRock, PowerColor, and XFX.

I was able to get an XFX for $599.

I was thinking I had to either ger a 9070 or just walk away as it did not sit well to spend more than $700 for a $599 card that should have really been $549 or so.

Word was they had over 700 - 800 Baseline 9070XT's and then some of the higher priced as well

RnR_au · Mar 6, 2025

gdansk said:
Samsung claim to be sampling 24gbps GDDR6 chips.

2022 claim... you would expect them to have something out by now...

The Future, Faster: Samsung Begins Sampling Industry’s First 24Gbps GDDR6 to Power the Next Generation of Graphics Cards | Samsung Semiconductor USA

The first-of-its-kind 16-gigabit (Gb) Graphics Double Data Rate 6 (GDDR6) DRAM featuring 24-gigabit-per-second (Gbps) processing speeds is 30% faster than previous offerings. The chip incorporates an innovative circuit design and advanced insulation that minimizes current leakage to deliver the...

semiconductor.samsung.com

gdansk · Mar 6, 2025

RnR_au said:
2022 claim... you would expect them to have something out by now...

They still list it on their site, if they had cancelled it perhaps they should have removed it.
But either way it's vaporware.

RnR_au · Mar 6, 2025

gdansk said:
They still list it on their site, if they had cancelled it perhaps they should have removed it.
But either way it's vaporware.

Yup... still listed on their site as sampling...

I guess those that wanted 24+Gbps went to GDDR7.

Kronos1996 · Mar 6, 2025

blckgrffn said:
That would also make perfect sense to me… is it really impossible they wouldn’t update/change the memory controllers for a midcycle refresh?

Improbable I’ll grant for sure. But given where the market is and the likely possibility of a validated G7 memory controller for Pro cards existing, it really couldn’t happen?

If they aren’t already on the die, adding them would mean swapping the GDDR6 PHY for GDDR7. Assuming they’re exactly the same size that would still mean taping out a new die. Zero chance of that hapenning.

QuickyDuck · Mar 6, 2025

No major customer committed to 24gbps GDDR6, it will suck in sample phase forever.

IEC · Mar 6, 2025

In2Photos said:
Just hopping on for the first time today. Does anyone know if AMD was able to sell all 3 units today or is it going to take some time?

Oh snap, I bought 1/3rd of global stock?

I better hire security, brb. /s

branch_suggestion · Mar 6, 2025

Honestly a port of N48 to N3P H1 next year with 24Gbit GDDR7 would actually be a very tidy product.
Though maybe the physdes guys will be too busy with RDNA5.

adroc_thurston · Mar 6, 2025

branch_suggestion said:
Honestly a port of N48 to N3P H1 next year with 24Gbit GDDR7 would actually be a very tidy product.

Lotta effort for little gains.

branch_suggestion said:
Though maybe the physdes guys will be too busy with RDNA5.

Indeed.

DAPUNISHER · Mar 6, 2025

I told you guys a month ago, it didn't matter how many cards they had at launch or if they were above fake MSRP, they were going to sellout lickity split. Belly aching comes off like Nvidia psyops bull💩 trying to dampen the excitement and success of the launch.

DAPUNISHER said:
Everyone keeps saying AMD has to nail the price this time or else. I think that is nonsense. It won't matter what the supply levels are when the new cards hit, or if reviewers say they are overpriced. I predict they sellout lickity split.

the madness has returned

View attachment 116892

marees · Mar 6, 2025

DAPUNISHER said:
I told you guys a month ago, it didn't matter how many cards they had at launch or if they were above fake MSRP, they were going to sellout lickity split. Belly aching comes off like Nvidia psyops bull💩 trying to dampen the excitement and success of the launch.

So $650 / $750 could have been the US MSRP for the 2 cards 🤔

"New unofficial MSRPs is 729€ for 9070 and 799€ for 9070XT (official is 629/689€). This is the price at which the stocks are held. Even drops that are only available at short notice are not offered at a lower price."

https://twitter.com/x/status/1897860199115112586

poke01 · Mar 7, 2025

marees said:
So $650 / $750 could have been the US MSRP for the 2 cards 🤔

"New unofficial MSRPs is 729€ for 9070 and 799€ for 9070XT (official is 629/689€). This is the price at which the stocks are held. Even drops that are only available at short notice are not offered at a lower price."

https://twitter.com/x/status/1897860199115112586

So far in Australia, MSRP is holding but I think next shipment it will def rise

DAPUNISHER · Mar 7, 2025

poke01 said:
So far in Australia, MSRP is holding but I think next shipment it will def rise

Elementary supply and demand economics in action. The consensus here seems to be it is due to allocation going to the more lucrative enterprise markets. Prebuilts are the other reason retail supply is not greater. DIY/retail is last in line.

AMD finally crushed it on a new generation launch. The big improvements in ray tracing and upscaling, along with the new mid range matching last gen flagship in raster while winning in ray tracing, is right out of Nvidia's playbook. Many of us said they should be embarrassed Intel debuted with better RT and upscaling. Good to see Radeon making some real progress for a change.

adroc_thurston · Mar 7, 2025

DAPUNISHER said:
Many of us said they should be embarrassed Intel debuted with better RT and upscaling

A toddler can do that.
AMD has PPA targets to adhere to.

BurnItDwn · Mar 7, 2025

DAPUNISHER said:
Elementary supply and demand economics in action. The consensus here seems to be it is due to allocation going to the more lucrative enterprise markets. Prebuilts are the other reason retail supply is not greater. DIY/retail is last in line.

AMD finally crushed it on a new generation launch. The big improvements in ray tracing and upscaling, along with the new mid range matching last gen flagship in raster while winning in ray tracing, is right out of Nvidia's playbook. Many of us said they should be embarrassed Intel debuted with better RT and upscaling. Good to see Radeon making some real progress for a change.

Another element of the demand, the upcoming tarrifs and expected price hikes across the board.... So, prices now, might be the best they will be into the near future. Not worth waiting to see if the prices drop in a few months, because IMO they probably wont.

DAPUNISHER · Mar 7, 2025

Timorous said:
4000 looks similar, 7000 and 5000 do a lot better at TPU. Could just be different scenes.

TPU and Tom's reviews are either lazy or shilling for Nvidia. Take your pick. Steve confirms anytime you need the performance i.e. heavy action, Blackwell falls on its face in Space Marine 2

GaiaHunter · Mar 7, 2025

BurnItDwn said:
Another element of the demand, the upcoming tarrifs and expected price hikes across the board.... So, prices now, might be the best they will be into the near future. Not worth waiting to see if the prices drop in a few months, because IMO they probably wont.

The $600/£569 msrp for the 9070 XT seems to be a teaser. Expect cards to be at least $£€50 over that.

GaiaHunter · Mar 7, 2025

DAPUNISHER said:
TPU and Tom's reviews are either lazy or shilling for Nvidia. Take your pick. Steve confirms anytime you need the performance i.e. heavy action, Blackwell falls on its face in Space Marine 2

I think that if the difference in price between the 9070XT and 9070 was actually $50, HWU would be correct, but the real difference seems to be more like $100.

BurnItDwn · Mar 7, 2025

GaiaHunter said:
The $600/£569 msrp for the 9070 XT seems to be a teaser. Expect cards to be at least $£€50 over that.

I ordered a non XT for $630 within about 2 mins of the global launch. (tried to get 9070xt, but they kept erroring in my cart when trying to check out and then they were gone, so I snagged what I could find that seemed still acceptable) I have been wanting to upgrade since RDNA3 launch and came close a few times to pulling the trigger when 7900XT was $640 or when 7900 GRE was $500.
It might be fun to turn on Global Illumination in POE2 and not have my framerate drop down to like 20.

Side note, overclocking looks like it could be a nice boon for those who got cards with adequate cooling ... close to 9070xt performance from the 9070 with a power boost and some undervolting ... (and 9070XT seems to get a nice gain from undervolt. Seeing a number of different videos on the subject, but I like this video by Machines & More.

I still want another GPU . the 9070 will go great with my 7800x3d. my old RDNA2 card will go good with my wife's AM4 setup. I'll take her old 1080 TI and stick it in my HTPC/recliner/projector gaming 1080p setup. Then i can give the old 2060 we have to a nephew, though I have another AM4 box I want to get online to give to my brother ... its missing a GPU, and he would love that 1080 TI ... and, I want something a bit more modern and beefy for the HTPC setup ...

So, gotta get the wife a 9070 as well, or, maybe if they ship some kind of bigger card in Q2, but likely I will see the price and laugh ...

Gideon · Mar 7, 2025

RDNA Architecture paper:

https://www.amd.com/content/dam/amd/en/documents/radeon-tech-docs/instruction-set-architectures/rdna4-instruction-set-architecture.pdf

Ranulf · Mar 7, 2025

Nvidia's reaction to the 9070XT. The ending is the best part.

Thunder 57 · Mar 7, 2025

Ranulf said:
Nvidia's reaction to the 9070XT. The ending is the best part.

Wait, it's not a Hitler reacts video?

GaiaHunter · Mar 7, 2025

https://www.overclockers.co.uk/pc-components/graphics-cards/amd-graphics-cards/amd-radeon-rx-9070-xt-graphics-cards

They have some 9070 XT available again, but the pulse and the reaper are now £630 instead of £570.

Timorous · Mar 7, 2025

GaiaHunter said:
https://www.overclockers.co.uk/pc-components/graphics-cards/amd-graphics-cards/amd-radeon-rx-9070-xt-graphics-cards

They have some 9070 XT available again, but the pulse and the reaper are now £630 instead of £570.

They also have the Gigabyte OC at 630 as well. Seems that is the current price for the XT models. 10% over RRP.

The Pulse 9070 is 540 and in stock so is probably better value vs the base XTs right now.

I also checked the 5070 and the cheapest 5070 in stock is £650, the cheapest 5070Ti is £854.

So you can get the 9070XT for cheaper than the 5070.

SolidQ · Mar 7, 2025

I don't understand why AMD so heavily OC card, if UV with much less Power have same FPS

Discussion RDNA4 + CDNA3 Architectures Thread

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