Tuesday, August 31st 2021

AMD Reportedly Readying RX 6900 XTX, Bringing the Battle to NVIDIA RTX 3090

Graphics cards may be on their way to becoming unicorns that you can only pay for after finding the proverbial pot of gold from under a rainbow, but that doesn't mean AMD and NVIDIA will slow down their competition any time soon - especially in this market, there's a huge profit to be made. And AMD may just be finally readying their true halo product - a graphics card that aims to beat NVIDIA's RTX 3090 across the board. Twitter user CyberPunkCat shared an alleged AMD slide showcasing a new, overpowered RX 6900 XTX graphics card. AMD's naming scheme for their RX 6900 series may be slightly confusing nowadays: the original RX 6900 XT carries the Navi 21 XTX die, and AMD has recently released a higher-performance version of that Navi 21 chip in the form of the Navi 21 XTXH - which power the liquid-cooled versions of the RX 6900 XT, with higher overall clocks than the original GPU release. However, there hasn't been a change in the RX 6900 XT nomenclature - but this new slide suggests otherwise.

If the leaked slide is real (keep your NaCl ready, as always), it appears that the RX 6900 XTX might pair both the higher-performance Navi 21 XTXH chip with higher memory speeds. While both Navi 21 XT and Navi 21 XTXH both make use of 16 Gbps GDDR6 memory, the slide indicates that the RX 6900 XTX will feature 18 Gbps memory speeds, exploring another avenue for increased performance. This decision would bring an increase in maximum theoretical memory subsystem bandwidth from the 512 Gbps in the RX 6900 XT up to 576 Gbps - a 13% increase, which would not translate into a proportional increase in final performance. However, considering how our own reviews show that AMD's RX 6900 XT with the Navi 21 XTXH silicon is already between one and three percent faster than NVIDIA's RTX 3090, even a slight, 5% performance increase over that cards' performance means that AMD might be able to claim the performance crown for the mainstream market. It's been a while since that happened, hasn't it?
Sources: CyberPunkCat @ Twitter, via Tom's Hardware
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106 Comments on AMD Reportedly Readying RX 6900 XTX, Bringing the Battle to NVIDIA RTX 3090

#26
Ravenas
nguyenLOL, fully path traced for what? that would just throw away of 20 years of progress in rasterization.
DXR is the best of both world, use rasterization and Ray Trace where they are strongest (meaning Global Illumination, Reflections, Lightning and Shadows are best ray traced, the rest are rasterized).

if you didn't care about RT, why would you play Metro Exodus EE, that game requires an RT capable GPU to even run you know.
Not caring about ray tracing is actually quite logical.

There isn’t a card on the market that can handle 60 FPS solid max setting with full ray tracing. Right now it’s just there, without hardware capable of utilizing it to its potential.
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#27
Tomorrow
londisteThere is no 18Gbps GDDR6 by spec.
Link in the article. 1-3% faster than FE, gaming power consumption +36W (~10%) compared to same 3090 FE.
Meaning there is no public 18Gbps documentation. This does not mean that it does not exist. Anandtech reported production in 2018. But keep putting your faith in manufacturer updating their website. Im sure half the stuff Buildzoid covers does also not exist because there is no public datasheet for it.
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#28
xkm1948
Having flashback to my X1950XTX and X850XTPE days
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#29
neatfeatguy
Let the battle of the 6900 XTX and RTX 3090 Super begin!

Or not. Whatever. Both will just be horrifically overpriced GPUs that scalpers will have wet dreams about.
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#30
Operandi
RTX 3090 vs 6900 XTX: "when an unstoppable force that ppl swear exists, meets an unmovable object that your friend's buddy told you about".
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#31
Viilutaja
nguyenLOL, fully path traced for what? that would just throw away of 20 years of progress in rasterization.
DXR is the best of both world, use rasterization and Ray Trace where they are strongest (meaning Global Illumination, Reflections, Lightning and Shadows are best ray traced, the rest are rasterized).

if you didn't care about RT, why would you play Metro Exodus EE, that game requires an RT capable GPU to even run you know.
I played the original one and wanted to see if Raytraced brought anything extra to table- it didn't.
Answer to your question: I tried to see if that EE makes me care more - it didn't!

We have established that updating an RX6900XT with newer chip (XTXH) with that AMD "ultimate" liquid cooled RX6900XT bios (18gbps mem), that should work.
But will that LC bios work on those regular RX6900XT's?
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#32
Ravenas
lowrider_05everyone with a existing XTXH card can get this LC Bios on their cards and have the 18Gbps memory (BE AWARE OF THE RISK)!

Just compare the LC Bios Memory to the regular XTXH Bios Memory, they are the SAME Number!

XTXH
AMD LC


Here is a Screenshot of my card running the LC Bios with up to 2370Mhz Speed on the Memory, with the Stock bios i could only get 2160Mhz max.
Which XTXH card are you using?
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#33
dicktracy
Still slow with mediocre FSR and Raytracing. rather buy slow consoles.
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#34
Makaveli
xkm1948Having flashback to my X1950XTX and X850XTPE days
I owned them both great cards.

And back on those days high-end cost you $500.
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#35
ThrashZone
Hi,
Last I saw at micro center powercolor 6900xt was like 2400.us+- so yeah just a tad insanely priced lol
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#36
TheinsanegamerN
londisteThere is no 18Gbps GDDR6 by spec.
Link in the article. 1-3% faster than FE, gaming power consumption +36W (~10%) compared to same 3090 FE.
Samsung begins production of 18Gbps GDDR6 memory:

pcper.com/2018/01/samsung-begins-mass-production-of-18-gbps-16-gigabit-gddr6-memory/
lowrider_05There is no 18Gbps Memory, the XTXH LC uses the same memory chips as on my OCF and i just flashed the LC bios when it was added to the VGA Bios Database and got the same 18Gbps to work. when you compare the bioses than you will see, that AMD just raised the Mem voltage from 1.35 to 1.4 Volts and the Memsoc from 850 to 900 MV.

TPU BIOS Link
See above. Samsung does make it.
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#37
xkm1948
ThrashZoneHi,
Last I saw at micro center powercolor 6900xt was like 2400.us+- so yeah just a tad insanely priced lol
Same. Those 6900 have been sitting on shelf since forever at local micro center too. Plenty of stock of AMD GPUs----at insane price. So naturally nobody wants them
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#38
ThrashZone
xkm1948Same. Those 6900 have been sitting on shelf since forever at local micro center too. Plenty of stock of AMD GPUs----at insane price. So naturally nobody wants them
Hi,
Think couple weekends ago they dropped the price 200.us and a lot were gone at Houston store.
Posted on Reply
#39
Vayra86
nguyenThe 6900XT LC with 18Gbps has already been reviewed by PCgameshardware, TL;DR:
_Use 350W stock, same as 3090 FE
_Beat 3090 at 1080p by 4%, tie at 1440p
_Lose to 3090 by 2% at 3440x1440 and 5% at 4K
I see. Great 1080p card I guess, then. :D
nguyenLOL, fully path traced for what? that would just throw away of 20 years of progress in rasterization.
DXR is the best of both world, use rasterization and Ray Trace where they are strongest (meaning Global Illumination, Reflections, Lightning and Shadows are best ray traced, the rest are rasterized).

if you didn't care about RT, why would you play Metro Exodus EE, that game requires an RT capable GPU to even run you know.
'Using where it is best'... in fact DXR is just the API, its devs that make it tick...

This goes back to the eternal development hell story and DirectX is not exactly known for top efficiency that way. Its a one size fits all API and its built that way, still. If you don't implement the shortcuts yourself, you have a slow piece of shit. Case in point: the actual practice since DirectX exists. Its a fine API, but don't overestimate it. Its good there is one that can cater to all things in one package. But that is what it is, not a single drop more. Its the hardware that makes the FPS appear, and the development work that determines what sort of effect you're getting presented and how much FPS it kills.

As for those four 'best being traced'... you say so, but honestly, I have yet to see any examples of it being objectively better, because its never more efficient. And on top of that I am not any more or less 'immersed' with a traced shadow or a good old shadowmap, be it for global or local shadows or lighting. In fact, many custom built effects that are tweaked to the setting work out quite a lot better for a lot less horsepower. They take work, yes, but so does anything that wants to look special. Meanwhile, Metro Exodus is full of locations that are either too dark or too bright or just not pleasant to look at.
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#40
Viilutaja
In EU there were plenty of RX 6900XT's in ballpark of 1400usd (AIB models) to 1700usd. And those special XTXH models were around 1900 usd.
I
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#41
ZoneDymo
dicktracyStill slow with mediocre FSR and Raytracing. rather buy slow consoles.
Not enough to report you once again for your useless fanboy remarks, in this case you just dont make any sense.
The second fastest card overall and you call it "still slow" ? and then you tell people to buy "slow" console instead.....are you ok man? like mentally?
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#42
londiste
TheinsanegamerNSamsung begins production of 18Gbps GDDR6 memory:
pcper.com/2018/01/samsung-begins-mass-production-of-18-gbps-16-gigabit-gddr6-memory/
The interesting bit is that these early announcements back in 2018 are it. No cards have used 18Gbps GDDR6 and even 16Gbps has been used only in this last generation.

Samsung lists 12, 14 and 16Gbps GDDR6:
www.samsung.com/semiconductor/dram/gddr6/
Micron lists 12, 14 and 16Gbps GDDR6:
www.micron.com/products/ultra-bandwidth-solutions/gddr6/part-catalog

Edit:
Actually, it does look like SK Hynix is sampling 16, 18 and 20Gbps GDDR6. Mass producing only 12 and 14 Gbps GDDR6.
product.skhynix.com/products/dram/gddr/gddr6.go
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#44
MentalAcetylide
nguyenThe 6900XT LC with 18Gbps has already been reviewed by PCgameshardware, TL;DR:
_Use 350W stock, same as 3090 FE
_Beat 3090 at 1080p by 4%, tie at 1440p
_Lose to 3090 by 2% at 3440x1440 and 5% at 4K
And....
_Lose to all NVidia cards by 100% for Iray rendering.
Its too bad their cards can't be used for this, otherwise I would consider having a render farm built with them whenever supply/prices become more reasonable.
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#45
Ravenas
lowrider_05ASrock OC Formula


Yes Samsung does no doubt about that but AMD is not using it.
I would load the BIOS to my current cards to test for 18gbps throughput, but I don't have copies of their BIOS for my cards.
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#46
sumludus
Nvidia just sold 17,000 founders edition cards through Bestbuy with an in-store only event; they opened the floodgates on Thursday morning (7:30am for me) with ~100 cards at select stores, and were out of stock by the weekend. My store had 30 people lined up at 8:00pm the night before, trying to get their hands on anything. So when faced with a limited amount of wafer supply, what does AMD do? Do they make bread for those who need to upgrade?

No.

They make cake for those who still have money to burn.

Even if these chips were coming from higher binned preexisting silicon rather than built with new allocation, the optics of this rumor are horrible.
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#47
Ravenas
sumludusNvidia just sold 17,000 founders edition cards through Bestbuy with an in-store only event; they opened the floodgates on Thursday morning (7:30am for me) with ~100 cards at select stores, and were out of stock by the weekend. My store had 30 people lined up at 8:00pm the night before, trying to get their hands on anything. So when faced with a limited amount of wafer supply, what does AMD do? Do they make bread for those who need to upgrade?

No.

They make cake for those who still have money to burn.

Even if these chips were coming from higher binned preexisting silicon rather than built with new allocation, the optics of this rumor are horrible.
You're talking about people with money to spend on high graphics card, and then claiming AMD is screwing the consumer by selling high end graphics cards. Are you focusing on the correct market segment?

Why does AMD have to cave on pricing because Nvidia cards are selling or are unavailable?
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#48
wolf
Performance Enthusiast
ViilutajaWho actually cares about RayTracing?
Quite a few people, actually.
ViilutajaIf it's not PathTraced entirely, it can't be really spotted.
Incorrect.
ViilutajaUnless it's like a very slow paced game where You have time to look around and "smell the roses".
Also incorrect.
Viilutajawouldn't care less about RT. Have RTX2080S.
Well, these statements all seem like personal truths rather than speaking for everyone. We may be a minority, but there are quite a few of us that enable and enjoy RT effects.
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#49
eidairaman1
The Exiled Airman
RavenasYou're talking about people with money to spend on high graphics card, and then claiming AMD is screwing the consumer by selling high end graphics cards. Are you focusing on the correct market segment?

Why does AMD have to cave on pricing because Nvidia cards are selling or are unavailable?
They dont
wolfQuite a few people, actually.

Incorrect.

Also incorrect.

Well, these statements all seem like personal truths rather than speaking for everyone. We may be a minority, but there are quite a few of us that enable and enjoy RT effects.
Can it even bee seen? I mean when ATi had superior AA and AF it was extremely noticeable.
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#50
wolf
Performance Enthusiast
eidairaman1Can it even bee seen?
Can ray traced effects be seen? uhh yeah dude, some of them are more subtle, like global illumination in Metro Exodus EE, it's so natural that it might be hard to notice, but it's extremely realistic which plays into why some clearly wouldn't 'notice'. Control's suite of RT effects are also excellent, more prominent being reflections but the indirect diffused lighting and contact shadows are also top notch. DOOM Eternals reflections are also very obvious in certain levels, but admittedly not in some others due to material types (like a hell level vs a man made structure level). Just a few examples from the small set of RT games I've played.

If you, or the other chap I quoted, or the person(s) that like your post don't find the effects noticeable (if you/they even have an RT capable card and have tried for them/yourselves), I can't change what you notice or your visual preferences, and I don't intend to, but there are two sides to the coin. There is a group of us who are into it, who notice it, who enjoy the best of the best in graphical fidelity, and to my eyes the differences can range from natural and subtle realism, to prominent and transformative to the visual experience.

An obvious caveat would be the steeper hardware requirement, and sure, if you don't have high end hardware (or better yet if you want to play with RT, an RTX 2080TI or above) you might also not find the performance-to-visual trade-off worthwhile. For me @ 3440x1440 @144hz with an undervolted 3080, I have 0 performance issues in those games with everything maxed and DLSS quality (whole other kettle of fish if people are 'unwilling' to use it).
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