AMD Radeon RX 6900 XT LC Specs Confirmed: 12% Higher Core and Memory Clocks, 10% Higher Power

[btarunr]

A leaked SKU sheet posted to Twitter by VideoCardz confirmed that AMD is indeed positioning the Radeon RX 6900 XT Liquid Cooled (LC) as a SKU separate from the RX 6900 XT. The finalized specs reveal that the card features Game Clocks of 2250 MHz, compared to 2015 MHz of the stock (air-cooled reference) RX 6900 XT; while the memory now operates at 18 Gbps (GDDR6 effective), compared to 16 Gbps on the reference card. This gives the GPU a memory bandwidth of 576 GB/s, compared to 512 GB/s on the reference. To support these, the TBP (total board power) value is increased by 10%, and is now at 330 W, compared to 300 W on the reference RX 6900 XT. The RX 6900 XT LC lugs an all-in-one, closed-loop, liquid cooling solution, while drawing power from the same two 8-pin PCIe power connectors as the original RX 6900 XT.



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[TheDeeGee]

And 5% faster from what i read.

Totally worth it

 

[Richards]

3080ti response

 

[maxitaxi96]

A single 120mm rad for 330Watts? AMD, are you guys insane??? I get the whole SI and OEM compatibility stuff... but still... that fan will have to spin like crazy...
Also it's not like a 240mm aluminium rad is THAT much more expensive compared to a 120mm, especially not for manufacturers.

Why even bother to watercool it?

 

[GerKNG]

or you just open MPT and do it yourself.

atleast it's great that they care enough to make a LC Edition that is not the awful ASUS one with tons of wires or the 2 year warranty no right to repair scumbags from sapphire.

 

[spnidel]

A single 120mm rad for 330Watts? AMD, are you guys insane??? I get the whole SI and OEM compatibility stuff... but still... that fan will have to spin like crazy...
Also it's not like a 240mm aluminium rad is THAT much more expensive compared to a 120mm, especially not for manufacturers.

Why even bother to watercool it?

120mm is plenty for 330 watts, sub 60c guaranteed

 

[GhostRyder]

Darn, I was hoping it was going to be a normal liquid block to put in a loop. Oh well.

 

[watzupken]

3080ti response

I disagree. In games where the RX 6900 XT is soundly beating the RTX 3090, and where it’s soundly getting beaten by RTX 3090, I doubt this card will change the positions given the slight improvement in specs in my opinion. This card is probably already in the works and not something they cook up at the very last moment. It’s more like the usual XTX version.

 

[holyprof]

5 to 8% performance gain over 6900XT, still can't buy it at normal price anywhere.
YAWN.

 

[watzupken]

120mm is plenty for 330 watts, sub 60c guaranteed

I think it’s possible for the 120mm radiator to keep up, but that’s assuming you don’t load the GPU for too long. Under sustained load, the water temp will keep increasing without sufficient surface area to help it lose the heat. Which ultimately will cause the temps to rise. I agree that for such a high end card, it’s more appropriate to have a 240 AIO cooler.

 

[Caring1]

I think it’s possible for the 120mm radiator to keep up, but that’s assuming you don’t load the GPU for too long. Under sustained load, the water temp will keep increasing without sufficient surface area to help it lose the heat. Which ultimately will cause the temps to rise. I agree that for such a high end card, it’s more appropriate to have a 240 AIO cooler.

Or attach a Delta fan.

 

[spnidel]

I think it’s possible for the 120mm radiator to keep up, but that’s assuming you don’t load the GPU for too long. Under sustained load, the water temp will keep increasing without sufficient surface area to help it lose the heat. Which ultimately will cause the temps to rise. I agree that for such a high end card, it’s more appropriate to have a 240 AIO cooler.

my fury x with the 120mm rad kept the card sub 60c while sucking on 300w of power

 

[KainXS]

A single 120mm rad for 330Watts? AMD, are you guys insane??? I get the whole SI and OEM compatibility stuff... but still... that fan will have to spin like crazy...
Also it's not like a 240mm aluminium rad is THAT much more expensive compared to a 120mm, especially not for manufacturers.

Why even bother to watercool it?

It will be fine, Vega LC was also fine. The only real worry with these coolers is how long they actually last.

 

[Makaveli]

3080ti response

I'm not so sure of that.

Navi 21 XTXH Was released before the 3080ti

Read more: https://www.tweaktown.com/news/7935...d-navi-21-xtxh-gpu-breaches-3-3ghz/index.html

 

[GhostRyder]

Its funny, cards are in stock on newegg being sold by newegg, but they are at scalper prices.

I wonder how well these XTX variants will clock

 

[Kohl Baas]

I think it’s possible for the 120mm radiator to keep up, but that’s assuming you don’t load the GPU for too long. Under sustained load, the water temp will keep increasing without sufficient surface area to help it lose the heat. Which ultimately will cause the temps to rise. I agree that for such a high end card, it’s more appropriate to have a 240 AIO cooler.

Because you most likely base your assumption on single loop custom watercooling which is a highly unbalanced solution for a GPU. The GPU is fine and dandy with the water temp hitting 55°C, while a single loop in most case must top at 35°C in order to keep the less tolerand CPU cool enough. Assuming a 25°C room temperature, a 120mm radiator running on 55°C water dissipates as much heat as a 360 radiator on 35°C water.

I used to play with these stuff in my loops in order to achieve as much silence as possible without the need for oversizing the radiators.

 

[ZoneDymo]

And 5% faster from what i read.

Totally worth it

totally worth...what?
Im not sure what you mean, totally worth making a watercooled version of your card? how is not worth it?

 

[Chomiq]

200% the msrp.

 

[dicktracy]

Still slow with DXR. Nothing can save them except for a new architecture.

 

[DeathtoGnomes]

Or attach a Delta fan.

2 even, push-pull

I think it’s possible for the 120mm radiator to keep up, but that’s assuming you don’t load the GPU for too long. Under sustained load, the water temp will keep increasing without sufficient surface area to help it lose the heat. Which ultimately will cause the temps to rise. I agree that for such a high end card, it’s more appropriate to have a 240 AIO cooler.

dont forget that the heat is being removed from the case, assuming its setup properly.

 

[Minus Infinity]

Imagine how well Navi 21 would have performed if they didn't gimp the bus width. 256 bit and they wonder why oit goes from easily having the 1440p crown to getting beaten in 4K. Let's hope Navi 31 doesn't get the gimp treatment too.

 

[evernessince]

Still slow with DXR. Nothing can save them except for a new architecture.

You are stating a universal, not something that applies only to this or AMD cards. Performance of RT on all current gen Nvidia and AMD cards is unacceptable for the output. We are in need of over a 100 fold increase in RT performance before meaningful RT is possible in games. Of course that's assuming game engines don't just add those features via rasterization anyways like the GI, improved reflections, and ray cast shadows that are already possible to do via rasterization with the new unreal engine.

Imagine how well Navi 21 would have performed if they didn't gimp the bus width. 256 bit and they wonder why oit goes from easily having the 1440p crown to getting beaten in 4K. Let's hope Navi 31 doesn't get the gimp treatment too.

Larger buses take up more space and require more power, as AMD has learned with their past cards like the R9 200 series. It's a better to use a smaller bus and improve on other aspects that can increase effective bandwidth. Things like memory compression, cache coherency, global shared cache, higher memory speed, ect. With RDNA2, AMD is able to extract more performance per square mm. Work smarter, not harder.

 

[Jism]

120mm is plenty for 330 watts, sub 60c guaranteed

The 295X2 had 500W of TDP and also a single fan + radiator of 120mm combo. These things are designed to run into the 80 degree mark. With 330W max your well below that.

People these days; like if engineers dont know what they do. Cards get tested before release. Hell they even throw a running card inside a heated enclosure to ensure working(s).

Thats why these voltages of chips are uncommon high if you start undervolting them. It's to guarantee working in all possible conditions.

 

[Mescalamba]

Cool.

Now I will go back to wait for graphic cards priced at MSRP.

 

[The red spirit]

And 5% faster from what i read.

Totally worth it

It's for those people who want absolutely best at any price. I don't think that value really matters to them, as long as it is faster.