Question Speculation: RDNA3 + CDNA2 Architectures Thread

[uzzi38]

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 is much bigger than from RDNA1 to RDNA2. We should expect many big improvements in GFX11. 🤔" / Twitter

 

[biostud]

Looking at your profile, I have a similar system (except 5930 CPU, plus NVidia 780 Ti), so I will be upgrading an archaic system.

At this point, the 5800x3d + 6750 XT bundle on amd.com looks great at $778.

Or wait another ~3 months for 7800x3d + 7800 XT, hopefully for ~ $,1000

As far as 6800 XT, I think this one is really discontinued, and stocks are running down. The xx50 cards are still being produced, but not in stock in overwhelming quantities. So, it looks like AMD is managing to clear its inventories, and quite aggressive pricing on RDNA 3 cards will not be interfering that much with the RDNA 2 cards - as is the case currently with NVidia's cards.

I'm planning the 2nd option, but a full upgrade, so closer to $2k.

 

[Joe NYC]

for older people with bad eye sight with corrective lenses it doesn't make a huge difference. My eyes aren't the same as a 20 year olds or even a 30 year olds or even a 40 year old's. I can make out major details in rt scenes, anything other than that my eyes won't pick up on. I want good graphics with good frames. I'll leave stellar graphics and less frames to the young.

Edit: disregard, I got my math wrong...

 

[JujuFish]

I have a 1440p monitor, and I think 2k might still be a worthwhile upgrade for my eyes to see the difference, but I doubt about 4k.

If you're on a 1440p monitor, you're above 2k.

 

[Joe NYC]

I'm planning the 2nd option, but a full upgrade, so closer to $2k.

I was thinking CPU + GPU only, not the whole system.

I think Zen 4 V-Cace at $450 + 7800 XT (Navi 32) at $550+

BTW, from my Tweet in July, I hit the jackpot on pricing, for the bottom of Navi 31 pricing.

 

[DisEnchantment]

Something is not adding up with N31.

• The chip has too much BW. 2.7x BW for 1.2x more CUs? That doesn't sound right.
• Rumored V Cache on top of IC for even more over provisioned BW?
• Chiplet for so small die?

I think they screwed up somewhere with multi GCD.
And the CU is so small. Its >25% smaller vs RDNA2
Why not devote enough die area to RT?


Also moment of silence to our in house RDNA3 leakers

 

[Joe NYC]

If you're on a 1440p monitor, you're above 2k.

Oops, looks like I got my math wrong, I actually do want 4k.

 

[Joe NYC]

Something is not adding up with N31.

• The chip has too much BW. 2.7x BW for 1.2x more CUs? That doesn't sound right.
• Rumored V Cache on top of IC for even more over provisioned BW?
• Chiplet for so small die?

I think they screwed up somewhere with multi GCD.
And the CU is so small. Its >25% smaller vs RDNA2
Why not devote enough die area to RT?


Also moment of silence to our in house RDNA3 leakers

A lot of things are pointing to 3+ GHz clock speed, which AMD may have expected, but could not get.

If AMD hit that 3 GHz, this would be a miracle chip. At current performance and price, it is still a great value, but short of a miracle chip.

 

[Unreal123]

The most weird thing happen since RDNA 2 is that AMD GPU are efficient lower resolution and Nvidia high end GPU requires 4k resolution.

It is because Nvidia driver are bottleneck for in lower res just like GCN was.


At 1440P RTX 3090 beats RTX 4090 ,however, At 4K it delivers same FPS as it giving on 1440p on 4K.

Nvidia Drivers has too many bottlenecks.

 

[SteinFG]

Decided to check how RDNA3 cards whould stack up in perf/dollar, made this sheet. Also guessing 7800 series MSRP, and it's probably identical to 6800 series MSRP

 

[biostud]

I was thinking CPU + GPU only, not the whole system.

I think Zen 4 V-Cace at $450 + 7800 XT (Navi 31) at $550+

BTW, from my Tweet in July, I hit the jackpot on pricing, for the bottom of Navi 31 pricing.

View attachment 70408

Navi32 you mean?

The front USB ports on my case are not working and I only have sata SSDs. So I think it is time for a full upgrade.

 

[leoneazzurro]

Something is not adding up with N31.

• The chip has too much BW. 2.7x BW for 1.2x more CUs? That doesn't sound right.
• Rumored V Cache on top of IC for even more over provisioned BW?
• Chiplet for so small die?

I think they screwed up somewhere with multi GCD.
And the CU is so small. Its >25% smaller vs RDNA2
Why not devote enough die area to RT?


Also moment of silence to our in house RDNA3 leakers

They probably aimed at 3GHz clocks, but could not reach them because of power consumption. Also, being the GCD die small but getting the most of the power consumption, that means that thermal density on the GCD is quite high.

 

[PJVol]

I think they screwed up somewhere

I literally thought so when I read this the day before they advanced together )

 

[Joe NYC]

Navi32 you mean?

The front USB ports on my case are not working and I only have sata SSDs. So I think it is time for a full upgrade.

Yes, I ment Navi32 (edited).

BTW, the system you have is capable of using NVMe storage (but that's not what you have).

I will be upgrading the whole system too, but I did not want to mix in cost of the other components into the equation.

BTW, in that pricing guess, I think I was too high on Navi 33. I can see AMD selling it at as low as $300

 

[Furious_Styles]

Decided to check how RDNA3 cards whould stack up in perf/dollar, made this sheet. Also guessing 7800 series MSRP, and it's probably identical to 6800 series MSRPView attachment 70409

Depending on how well the 7900 does in reviews I would definitely buy it over the 4090. I'm high refresh 1440p and don't care about RT so I'm a prime candidate for AMD this time around. Not paying the nvidia inventory clearing tax.

 

[Joe NYC]

With those figures? The 7900XTX. I'm still a devout rasterfarian.

haha, same here. I would have to look seriously if I have a single game that even has ray tracing as an option...

 

[Paul98]

I was a bit disappointed at first look at this, but going over it again today and looking at the competition it actually looks quite good and especially the path into the future. Those memory cache chiplets make a ton of sense for GPU's as unlike the CPU, depending on the GPU they already have a different memory bus width and cache size, and these chiplets can be used across the product stack. Then moving forward similar to how Zen evolved it's multicore to it's current state, I expect we will see similar with RDNA.

It also means that they end up with this much smaller ~300mm GCD.

 

[Joe NYC]

They chose to compete up to $999 market.

It was possible for AMD to have a 450 mm2 die (and AMD still may add one), for $1,500 market.

But the Navi 31 seems like a good fit for the current market conditions. And Navi 32 even better.

 

[gdansk]

It was possible for AMD to have a 450 mm2 die (and AMD still may add one), for $1,500 market.

But the Navi 31 seems like a good fit for the current market conditions. And Navi 32 even better.

But for some reason they don't ever bother to go big. Even Big Navi 21 wasn't Nvidia sized. Maybe some day AMD will wake up and realize the only thing internet commenters care about is halo products.

Of course, they don't do it because AMD knows no one wants to buy Radeon. They just want discount GeForce.

 

[Hans Gruber]

Is the 7900xtx shotting for 4080 or 4080ti performance? What if the 4080 outperforms the top tier AMD RDNA3 card?

 

[Det0x]

Someone on the internet made these graphs:

 

[biostud]

Yes, I ment Navi32 (edited).

BTW, the system you have is capable of using NVMe storage (but that's not what you have).

I will be upgrading the whole system too, but I did not want to mix in cost of the other components into the equation.

BTW, in that pricing guess, I think I was too high on Navi 33. I can see AMD selling it at as low as $300

Yeah, when I was a candidate for a nvme drive, three girls arrived within three years, and now it makes no sense to upgrade this old system.

 

[Geddagod]

Is the 7900xtx shotting for 4080 or 4080ti performance? What if the 4080 outperforms the top tier AMD RDNA3 card?

The 4080 almost certainly won't outperform the 7900xtx. The 4080 is a massively cut down 4090, to the point where I think even own Nvidia's own benchmarks show it leading the 3090 by 10-20%, IIRC. The 7900xtx from AMDs own benchmarks seems to be ~10% weaker than the 4090 in raster, so even if reviewers find the average to be ~20% weaker (worst case if AMD benchmarks were especially cherry picked), it would still be ~50% faster than the 3090, vs the 4080 which seems to be only 10-20% stronger than the 3090.
I think the 7900xtx would be matched by Nvidia releasing a 1200/1300 dollar 4080ti which matches it in raster, and then blows it out of the water in RT. The 4080 16GB could prob come down in price after Nvidia releases a "TI" generation. But this is just my speculation.

 

[Geddagod]

It was possible for AMD to have a 450 mm2 die (and AMD still may add one), for $1,500 market.

But the Navi 31 seems like a good fit for the current market conditions. And Navi 32 even better.

I find it hard to believe that a consumer spending $1500-2000 dollars is going to be a potential 7950xtx that maybe beats the 4090ti by 10-15% in raster, but then just gets absolutely demolished in RT. I really don't believe AMD is even going to bother competing at such a premium market unless they know they can get at least some what competitive in RT. It would just be kinda a bad look, PR wise.

 

[Hans Gruber]

So where is all the demand for graphics cards coming from? I don't see it. Yes the early adopters will get the 4090 but demand for top tier stuff drops off like a cliff.

 

[blckgrffn]

Yeah, when I was a candidate for a nvme drive, three girls arrived within three years, and now it makes no sense to upgrade this old system.

That stork was busy!

My main PC was static for several years after my two kids dropped from the sky.

I hear you. I like to clean sheet my main rig if I can. Maybe drop in a GPU later but that's about it. This build was a rare refresh for me.