Question Speculation: RDNA3 + CDNA2 Architectures Thread

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uzzi38

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Timorous

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I don't think you get it, according to the way that youtuber is making performance estimates the full N32 would offer 90% of the 6900XT performance.

I got it fully, just pointing out that 30/40% faster than 6900XT is probably where 7800XT will land give or take a bit of course.
 

Timorous

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Navi 31 Die Shot - by SkyJuice - Angstronomics

"Performance, power and price will be revealed at the launch event. Unfortunately, our A0 performance profiling results were not indicative of production samples, so we have refrained from detailing our findings publicly. Silicon and board cost is definitely lower than NVIDIA’s RTX 4090, so let’s see where the two Navi 31 SKUs will be priced."

So that die looks exactly the same as what Igor posted in his CG mockup. I presume then his 3 8-pin are going to be AIB OC cards with the 2 8-pin being reference.
 
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Timorous

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You got that the math is wrong, and are still pointing to the result of said math?

The gain he calculated for the 7900XT/XTX vs the 6900XT is very likely wrong but the end number of 30/40% is probably ballpark for 7800XT. Is this really hard to get? He fluffed the numbers for the comparison he did but by accident those numbers probably apply to a different comparison.
 
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Timorous

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No, its just looks very silly.

What is silly?

I am ignoring their method entirely and just saying that 30/40% increase over 6900XT looks about right for 7800XT / Full N32. I am basing that off of the laptop N32 ~= 6950XT at around 150W/160W info that has gone around. So 30/40% more at 220/230W roughly adds up. If that is silly then what is the point in a speculation thread because everything is silly.
 

moinmoin

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What is silly?
At no point you showed the math or other arguments why you consider the result as correct. So people see you defending the "accidental correct" result with seemingly nothing to back it up, only math that you yourself call wrong. That is silly.

No. he's saying that despite the stupid math, the tuber managed to stumble on a likely correct performance difference, but between 2 different cards that the tuber wasn't applying the stupid math to.
As if it wasn't confusing enough already.
 
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Tup3x

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Dec 31, 2016
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There's so much, really so much speculation this time, and yet somehow no concrete info about the actual performance.
Don't know what to expect this time.
I find the lack of actual leaks disturbing. It doesn't look like things are actually ready yet so I wonder if they are really coming out next month.
 
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Timorous

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At no point you showed the math or other arguments why you consider the result as correct. So people see you defending the "accidental correct" result with seemingly nothing to back it up, only math that you yourself call wrong. That is silly.

The laptop N32 stuff was discussed a few pages back as was the implication for full N32. I don't always have time to re-tread old ground when making a quick post.
 

Kaluan

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When was the last time AMD teased with a major product scheduled for 1-2 years in advance? Just a reminder, Zen 5 is *not* a 2023 product - it is 2024. 2023 is the same season as 2021/2022 was - riding a V-Cache wave.
They always seem give us a glance at next gen while demoing/announcing/launching current. They teased Genoa and confirmed Zen4c/128C/Bergamo's existence during the Milan-X announcement.

What is silly?

I am ignoring their method entirely and just saying that 30/40% increase over 6900XT looks about right for 7800XT / Full N32. I am basing that off of the laptop N32 ~= 6950XT at around 150W/160W info that has gone around. So 30/40% more at 220/230W roughly adds up. If that is silly then what is the point in a speculation thread because everything is silly.
Worth noting that N32 is possibly a even bigger generational leap vs N22 than N31 vs N21. 3x or more shaders, even the package size is bigger overall. It's reasonable to believe N32 may see SKUs with up to 300W TBP this gen (NOT 7700XT tho).
 

Timorous

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They always seem give us a glance at next gen while demoing/announcing/launching current. They teased Genoa and confirmed Zen4c/128C/Bergamo's existence during the Milan-X announcement.


Worth noting that N32 is possibly a even bigger generational leap vs N22 than N31 vs N21. 3x or more shaders, even the package size is bigger overall. It's reasonable to believe N32 may see SKUs with up to 300W TBP this gen (NOT 7700XT tho).

I think it depends on what TBP 7900XT and 7900XTX actually have. Entirely possible the 7900XT is the 2x8-pin and the 7900XTX even reference is actually 3x8-pin like the Igor image.

If 7900XT is 350W then I can see a 300W 7800XT. If 7900XT is 300W anyway and 7900XTX is the 350W part then I expect 7800XT to top out around 250-280W. Probably have lower efficiency than the N31 part due to being pushed more in the v/f curve like AMD did with N22.

Guess we can make some more educated guesses after the reveal.
 
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Saylick

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Sep 10, 2012
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Greymon is doing some incredibly cryptic tweets. Could mean just about anything and can be interpreted positively or negatively, e.g. Nvidia's full AD102 is still faster, the 4090 is still faster, Nvidia is king of power consumption, price, etc. Could even mean nothing at all and is just posting to get people's attention. If so, I guess I was caught lol

 

Vattila

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Oct 22, 2004
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As posted here earlier, Angstronomics has leaked an image of the "Navi 31" package, which shows the 7 chiplet design (a single GCD and 6 MCDs flanking it). This makes me think: Why is the GCD just one big chiplet? Why are the compute units not spread over smaller chiplets? I would think the compute units work pretty much independently, perhaps except for the writing to a shared frame buffer. Is the latter the bottleneck, perhaps, making it beneficial to keep them all on the same die? Or is it the overall controller/scheduler that is the bottleneck, and hence needs to be on the same die as all the compute units?

Navi 31 Die Shot - by SkyJuice - Angstronomics
 
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leoneazzurro

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Jul 26, 2016
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It may refer to raster or to RT, in general a safe bet would be that even with good improvements RDNA3 would be still lagging behind Nvidia in this particular sector.

Edit: later it seems he was referring to the full AD102, but that was practically granted for several reasons, not last the amount of (expensive) silicon used.
 
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gdansk

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Greymon is doing some incredibly cryptic tweets. Could mean just about anything and can be interpreted positively or negatively, e.g. Nvidia's full AD102 is still faster, the 4090 is still faster, Nvidia is king of power consumption, price, etc. Could even mean nothing at all and is just posting to get people's attention. If so, I guess I was caught lol

Full AD102 being on top really wouldn't surprise almost anyone. But Nvidia has such a large divide between AD102 and AD103 that AMD should be able to slot right in between and priced appropriately (at around $1200?) it would look quite compelling to me.