Monday, January 4th 2021

AMD Radeon Navi 21 XTXH Variant Spotted, Another Flagship Graphics Card Incoming?

AMD has recently launched its Radeon "Big Navi" 6000 series of graphics cards, making entry to the high-end market and positioning itself well against the competition. The "Big Navi" graphics cards are based on Navi 21 XL (Radeon RX 6800), Navi 21 XT (Radeon RX 6800 XT), and Navi 21 XTX (Radeon RX 6900 XT) GPU revision, each of which features a different number of Shaders/TMUs/ROPs. The highest-end Navi 21 XTX is the highest performance revision featuring 80 Compute Units with 5120 cores. However, it seems like AMD is preparing another similar silicon called Navi 21 XTXH. Currently, it is unknown what the additional "H" means. It could indicate an upgraded version with more CUs, or perhaps a bit cut down configuration. It is unclear where such a GPU would fit in the lineup or is it just an engineering sample that is never making it to the market. It could represent a potential response from AMD to NVIDIA's upcoming GeForce RTX 3080 Ti graphics card, however, that is just speculation. Other options suggest that such a GPU would be a part of mainstream notebook lineup, just like Renoir comes in the "H" variant. We have to wait and see what AMD does to find out more.
Sources: USB, via VideoCardz
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38 Comments on AMD Radeon Navi 21 XTXH Variant Spotted, Another Flagship Graphics Card Incoming?

#2
Searing
Vayra86
More X'es. YES
A version with GDDR6X memory instead of 6?
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#3
Sihastru
H stands for low power / mobile.
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#4
evernessince
Searing
A version with GDDR6X memory instead of 6?
Pretty sure Micron and Nvidia teamed up for GDDR6X. Not sure if it's open to others.
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#5
medi01
Vayra86
More X'es
Mm, for me, only H stood out.
Perhaps because 6800 XTX => 6900 XT.

I wonder what H stands for. "Ha ha" perhaps?
AleksandarK
It could represent a potential response from AMD to NVIDIA's upcoming GeForce RTX 3080 Ti
6900 XT beats 50% more expensive 3090 in a number of games.
In fact, it wins 5 to 2 against 3090 in most new/actual games


www.computerbase.de/2020-12/amd-radeon-rx-6900-xt-review-test/2/#abschnitt_benchmarks_in_sieben_topaktuellen_spielen

3070's sell for $700+ (the cheapest I could find in Germany is 729 Euro)

Why would AMD need anything to counter 3080Ti???
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#6
ebivan
Yeah, I reckon its a mobile variant too.
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#7
HD64G
It might be a reference liquid cooled version with higher clock limits for better oc.
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#8
LemmingOverlord
XTX is a standard classification for the high-end graphics cards.

The "H" is probably just pointing to a high-performance mobile part, like, I dunno... their CPUs?!

So XTXH is a mobile high-performance part, which makes sense, since the screen grab says "27W".

I think some basic knowledge of AMD naming would've come in handy, here.

If you stretch this a bit, and considering the hybrid naming XTXH, it could mean some APU, but I'm thinking it's just a notebook system with CPU and Radeon GPU.
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#9
DeathtoGnomes
H stands for ....

HurrayWeBeatNvidia

Hyperspeed

HahaCantTouchThis

Hush

HokeyPokey


huhwhat

:D
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#10
phill
I remember the XTX models back in the day... AMD come on, give us a 3090 killer :D Maybe its something to combat the 3080 Ti? Then the 6900 XT can drop a little in price?? We can but dream I guess :)
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#11
Outback Bronze
phill
We can but dream I guess
I've been dreaming of a nice new gpu for a while now...:sleep:
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#12
phill
Outback Bronze
I've been dreaming of a nice new gpu for a while now...:sleep:
Myself included, been after a 3080 Tuf when I heard how much extra the 3090 was going to be... I'm happy to hold on for a little longer now and see what AMD are going to do with this XTX model... It'll be a shame if it's mobile but meh, not going to matter so much :)
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#13
mtcn77
Those infinity fabric interconnects can save a lot of power, if you let it buffer the communication. They are not simple copper interconnects which have fixed power consumption.
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#14
Makaveli
This sounds like a mobile part.
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#16
Ravenas
Bringing another variant when there isn't near enough inventory to supply current demand. Seems smart. Also come out with the XTX Bot Proof edition.
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#17
saikamaldoss
Either HBM version or The full fat CU with 7300+ core version ? Hope so... good that scalpers emptied all that stock that stopped me from making the move on a new GPU... Great news
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#18
Aldain
LemmingOverlord
XTX is a standard classification for the high-end graphics cards.

The "H" is probably just pointing to a high-performance mobile part, like, I dunno... their CPUs?!

So XTXH is a mobile high-performance part, which makes sense, since the screen grab says "27W".

I think some basic knowledge of AMD naming would've come in handy, here.

If you stretch this a bit, and considering the hybrid naming XTXH, it could mean some APU, but I'm thinking it's just a notebook system with CPU and Radeon GPU.
The H does not stand for Mobile when it comes to AMD.. Their mobile lineup always has a M prefix when it comes to the GPU, so this could be an HBM 2.0 card.
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#19
Jism
Perhaps a 384 bits or even 512bits wide graphics card.
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#20
1d10t
Higher scarcity of XTX 6900XT?
ilyon
XTX "HBM" ?
Make sense but I doubt that HBM2e will coming to consumer product.
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#21
Chrispy_
HD64G
It might be a reference liquid cooled version with higher clock limits for better oc.
Hydro is likely, IMO.

The other option could be HBM for a datacenter/workstation card - I'm honestly not sure if RDNA2 memory controllers and caches were designed/compatible with HBM though.
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#22
Punkenjoy
what if it's just unlocked on overclocking parts.
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#23
HD64G
A HBM2 prosumer GPU is a strong possibility indeed.
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#24
Turmania
I have yet to find a current gen AMD offerings in both CPU and GPU segments available to order at rated prices or close to it. It is just been a paper launch year. From all companies. Very disappointed.
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#25
Mouth of Sauron
My strongest candidate is the laptop version, heavily cut (NVIDIA is doing it also).

I strongly doubt any memory-related change, if it wasn't engineered from the start and in ready design. The reason being they strongly opted for GDDR6 (not 'X', not HBM-any) and made that large on-chip cache for compensation. More memory = more cache or different bus, so different silicon. Different memory type = more expensive + whole cache stuff is then of questionable need (guess they tested extensively already, so it's possible but not probable).

A related guess is that the whole top-line is mostly finished, there can be better binning or something like that, price correction (highly needed), and the whole RDNA2 train goes toward (desperately) needed mid/low range, APUs too. I don't know if any lithography gimmick like Zen to Zen+ is very easy to do, if it is then maybe that - but not NOW, maybe at 21Q4...

Ampere and RDNA2 are new products with unfinished lineup, both companies will surely look to return the expensive R&D investments, no chance that anyone goes crazy and launch a new generation this year. AMD got what they wanted, similar to Zen 1 vs. Intel - not besting them in all scenarios, but being competitive and bit cheaper. NVIDIA still has Jensens stupid 'fastest overall' crown (they invested huge money in the past for similar stupid cards which nobody sane bought), and what I dub as 'equally idiotic RT crown' (being first adopter among buyers is... either willing enthusiasm, supporting new tech because someone needs to OR being too rich, too uninformed OR being desperate to play CP2077 or whatever 4 other games support it).

[Yeah, I was connected with or worked in that (rendering) field for three decades. I read the news from professional/dedicated forums even now. Hobby now, but a way above average knowledge still, if I may say so]

Like 70% games has exactly ZERO need for any RT - f00k, look at all those pixel-art games (the worst possible example) people like to play so much. Strategies. Simulations (except MS FS and such). Let's face it, it's mainly FP(s) technology. What about cartoonish graphics? 2D? Both may look *somewhat* better with RT lights/shadows, but how much is that and how much all of it worths to an average (-budget) player? Rasterized lights/shadows aren't catastrophically bad, and the whole low/mid market perhaps don't need it that much...

My (posted, initial) opinion was that GOOD RT needs at least 5 years. But some guy from the gaming industry said that real-lime PHOTOREALISTIC gaming is 10 years away, guess he knows it much better than I do. Also, RT isn't equal to photorealism at all.

Also, who wants ALL games to be photorealistic? Not all players, for sure.

[I've skipped all tech details. I wanted to write an easy to understand, general article about RT - but the time...]

Back to the topic - NVIDIA has what they want now, and AMD has it, too. My opinion is that high-end improvements will come with better lithography - 6nm, 5nm, less; perhaps MCM - for both (and perhaps Intel, hahahaha).

Not like anything any GPU producer will invest soooo much THIS year, probably next, too.

So, perhaps binning, relatively small improvements - perhaps this year, larger ones next or even later... There. My opinion. For both.

Oh, and NVIDIA knows much more about RT (and photorealism) then they advertise now. There is a good ebook about it on NVIDIA site - yup, I've read it, nothing to disprove what I said here, or before. F00k, they have top-level 'guys' in the field - would be weird otherwise, RT existed for longer than I'm in it... True photorealism likely require VR, because it's needed to follow eyeball movement to follow the focus, just to name one tech-detail...
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