Question Speculation: RDNA2 + CDNA Architectures thread

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uzzi38

Platinum Member
Oct 16, 2019
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All die sizes are within 5mm^2. The poster here has been right on some things in the past afaik, and to his credit was the first to saying 505mm^2 for Navi21, which other people have backed up. Even still though, take the following with a pich of salt.

Navi21 - 505mm^2

Navi22 - 340mm^2

Navi23 - 240mm^2

Source is the following post: https://www.ptt.cc/bbs/PC_Shopping/M.1588075782.A.C1E.html
 

Hitman928

Diamond Member
Apr 15, 2012
6,186
10,693
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Its funny that AMD is accused of showing OC results, with 2.2 GHz Max Boost clocks on their GPUs when we already have seen AIB Clocks, and they show 2.4, and up to 2.5 GHz on 6800XT bios.

This is the most hilarious thing about this launch.

Yeah, it's possible that it will be like the 2080Ti where AIB cards offer significant performance increases, if you don't mind the increased power draw. The RTX 3000 series appears to be pretty much tapped out in regards to overclocking. We'll find out soon enough.
 

moinmoin

Diamond Member
Jun 1, 2017
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Pretty good event by AMD, MALL did deliver the goods in the end. Ominous lack of any RT related benchmarks though. This will be interesting.

Nice to see that DirectStorage API feature made it into RDNA2, I was worried that it wouldn't with all the SSD focused gaming bonanza.
Who seriously questioned that? It's essentially Xbox Series tech, which the RDNA2 on there obviously has to support. Since Microsoft made that part of Windows with DirectStorage API it would have been very odd if RDNA2 on PC didn't support it as well.

(Sleazy Nvidia obviously had to put an own name on it like with everything.)

The 6800's problem isn't nvidia (yet), it's the 6800 XT with 20% more CU for $70 more (+12%).
Will Nvidia stop the 3070 launch announced for tomorrow now?

So 6900XT is not AMD exclusive and reference only after all?
Instead it's delayed into December so AIB couldn't leak that. ;)
 

KentState

Diamond Member
Oct 19, 2001
8,397
393
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Great, now I have to figure out how to sell a 3080 and get either a 6800 XT or 6900 XT. I will probably hold onto the 3090 for the time being.
 

sze5003

Lifer
Aug 18, 2012
14,246
639
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Great, now I have to figure out how to sell a 3080 and get either a 6800 XT or 6900 XT. I will probably hold onto the 3090 for the time being.
Shouldn't be too hard seeing how there are several people that are still waiting to get their 3080's or for them to go in stock.
 

Mopetar

Diamond Member
Jan 31, 2011
8,113
6,768
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If nothing else because nVidia will have been testing their own cards on Intel up until now so AMD had to have a level playing field to test their own cards.

It will be interesting to see what nVidia uses in the future - would be delicious to see them forced to use AMD Ryzen in time.

I forget if it was around the original Xen launch, but NVidia did have some marketing recommending their cards with Zen. It wasn't the high end cards, but they will use whatever CPU lets them show the card in the best light. AMD used Intel CPUs in plenty of instances


Lol at the people scalping 3000 series, especially 3090.

Hopefully this means people who want a 3090 for close to MSRP will actually be able to get one.

$999 is a great price that will make 3090 potential buyers think twice. $649 is very good price considering 6gb more memory for $50 less and equal performance. However no DLSS and weaker ray tracing performance. 6800 is pointless.

6800 is priced relative to the 3070 since AMD has nothing else to compete with it right now. Between the better average performance and the extra 8 GB of RAM it's got a case to make. It's on AMD's big die so they don't want to sell it for less than they can probably get and especially not at the same price as a smaller die from NVidia.

It looks like a bad value compared to the 6800XT (and is) but that also has a dual purpose of up selling people to a 6800XT. They're the same die so AMD obviously doesn't want to make the most cut down part the best value. That just kills sales of the other parts that use the same die and make more money.
 

soresu

Diamond Member
Dec 19, 2014
3,227
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Ominous lack of any RT related benchmarks though. This will be interesting.
Indeed, though they did use the term "max settings" at least once.

As to whether "max settings" means everything and the kitchen sink + RT, we will have to wait and see.

Hopefully that denoising shader in the new FidelityFX toolset does not demand much on top of whatever the game does.
 

fleshconsumed

Diamond Member
Feb 21, 2002
6,485
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Overall nice showing by AMD. Slightly faster than nVidia at a slightly cheaper price as well.

Would have been nice to see cheaper prices still, but nobody really expected AMD to get into a price war with nVidia.
 

blckgrffn

Diamond Member
May 1, 2003
9,298
3,440
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www.teamjuchems.com
Overall nice showing by AMD. Slightly faster than nVidia at a slightly cheaper price as well.

Would have been nice to see cheaper prices still, but nobody really expected AMD to get into a price war with nVidia.

Not when the market has shown the ability to pay much higher prices and still consume massive quantities of products.

My personal price threshold is ~$350-$400 so we'll see if there is anything in my personal price bracket later.

Then again, I did end up getting into $800+ iphones because the resale was so stable. If that holds with GPUs I may step up.
 
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Hans Gruber

Platinum Member
Dec 23, 2006
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Overall nice showing by AMD. Slightly faster than nVidia at a slightly cheaper price as well.

Would have been nice to see cheaper prices still, but nobody really expected AMD to get into a price war with nVidia.

A price war is exactly what AMD needs to do with both Nvidia and Intel. A Zen3 bundle with motherboard and Graphics card is another option they should consider.
 

alexruiz

Platinum Member
Sep 21, 2001
2,836
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A price war is exactly what AMD needs to do with both Nvidia and Intel. A Zen3 bundle with motherboard and Graphics card is another option they should consider.

Why, so we get cheaper stuff?
If they have the leading products, they will price accordingly to reinvest in R&D so people don't complain about "not being competitive"

A bundle would be a good idea though.
 

psolord

Platinum Member
Sep 16, 2009
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So do we know what this 128MB infinity cache is? If I am not mistaken, they said something in the lines of 256bit+infinity cache=Twice the performance of standard 384bit bus. How is this possible? wtf?

Also do the consoles have it? Will it be present on lower tier cards?
 

zinfamous

No Lifer
Jul 12, 2006
111,165
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So, their charts for direct comparison to RTX are using 6800/6900 with Rage mode and with SAM. Rage mode seems like a silicon lottery deal, and SAM...sounds to me like this generation's "Cool AMD exclusive feature that will be really awesome if the Devs program for it in each specific game" At least, that is in Ian's article, that it requires Dev work for each game, if it is going to provide any benefit.

Man, we've been here before...a lot. Yes, I hope it happens, but I dunno....

Though, if they are able to benchmark it in existing games, I guess that means this is more of a known feature for some time, or something that AMD can already exploit that doesn't require much of anything new?

I wonder if the games where AMD matches or underperforms nVidia with that juice turned out, these are games where these features just don't exist?

Still, at least with the 6800XT, the performance vs 3080 without that stuff looks very decent.
 

zinfamous

No Lifer
Jul 12, 2006
111,165
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The 6900XT results are using rage mode and the smart access memory with zen3.

yes, very important to note, because it is a bit of silicon lottery + "benevolence of the devs" to hope that the feature (SAM) is active.

I also want to see if SAM will work with AM4 4xx boards + Zen3 after 2021 firmware update. ...and if all 4xx boards are created equal for Zen3 compatibility.

lots of ***'s to sift through in those posted performance numbers.
 

Glo.

Diamond Member
Apr 25, 2015
5,803
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So, their charts for direct comparison to RTX are using 6800/6900 with Rage mode and with SAM. Rage mode seems like a silicon lottery deal, and SAM...sounds to me like this generation's "Cool AMD exclusive feature that will be really awesome if the Devs program for it in each specific game" At least, that is in Ian's article, that it requires Dev work for each game, if it is going to provide any benefit.

Man, we've been here before...a lot. Yes, I hope it happens, but I dunno....

Though, if they are able to benchmark it in existing games, I guess that means this is more of a known feature for some time, or something that AMD can already exploit that doesn't require much of anything new?

I wonder if the games where AMD matches or underperforms nVidia with that juice turned out, these are games where these features just don't exist?

Still, at least with the 6800XT, the performance vs 3080 without that stuff looks very decent.
For the second time, read again the slides of testing methodology about RX 6800XT. Rage Mode is only for RX 6900XT.

Secondly. You accuse AMD of overplaying their GPUs, when AMD is showing absolute worst case scenario, since the AIB GPU will clock way higher than reference designs.
 

Glo.

Diamond Member
Apr 25, 2015
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I don't think there is anything to add to this.

O_O
 

Saylick

Diamond Member
Sep 10, 2012
3,531
7,858
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Hmm, there's some more info about the Infinity Cache on AMD's RDNA 2 webpage in the footnotes:
  1. Measurement calculated by AMD engineering, on a Radeon RX 6000 series card with 128 MB AMD Infinity Cache and 256-bit GDDR6. Measuring 4k gaming average AMD Infinity Cache hit rates of 58% across top gaming titles, multiplied by theoretical peak bandwidth from the 16 64B AMD Infinity Fabric channels connecting the Cache to the Graphics Engine at boost frequency of up to 1.94 GHz. RX-535

This is in reference to AMD's claim of the following:
- 256-bit 16 Gpbs GDDR6 = 512 GB/s
- 384-bit 19.5 Gpbs GDDR6x = 936 GB/s
- 256-bit 16 Gpbs GDDR6 + 128MB Infinity Cache = 1664 GB/s Effective

A shot directly across the bow of Ampere.
 

Hitman928

Diamond Member
Apr 15, 2012
6,186
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SAM...sounds to me like this generation's "Cool AMD exclusive feature that will be really awesome if the Devs program for it in each specific game" At least, that is in Ian's article, that it requires Dev work for each game, if it is going to provide any benefit.

I don't think it requires developers to program for it, I found that highly doubtful given they showed it's effects across 10 existing games that I highly doubt they patched for this feature. I think it's more that SAM's performance improvement will be highly variable from game to game and could be coded for to get max benefit. AMD didn't go into hardly any detail about the feature so we'll have to wait and see exactly how it works though.