Benchmark Results: Quad-CrossFire!
Although we only have one Radeon HD 6990 in the lab, I was able to enlist the help of someone with two—someone who could test the mettle of four Cayman GPUs running cooperatively. He didn’t have the same benchmarks I typically run, but the following tests still showcase the potential of two boards.
Consider this an exhibition for now; until we’re able to test two 6990s in a case—any case, given the lack of specific guidance from AMD—it’s impossible to say how viable a pair of cards under load can actually be. We do know he measured 869 W of system power using the stock BIOS and 987 W with the overclocked firmware (that's two cards and a 5 GHz overclocked Sandy Bridge-based platform).
Crysis? Very high quality settings? 2560x1600 with 4x AA? More than 60 frames per second? Yeah, we’ve finally seen it all.
Far Cry 2 shows us that there is such a thing as too much graphics horsepower if your display configuration isn’t elaborate enough. Not even anti-aliasing can slow down two 6990s working cooperatively.
The only chart I didn’t include here was Resident Evil 5, which shows that AMD’s driver isn’t necessarily optimized for four-way CrossFire yet; there’s no scaling moving from one card to two.
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Out of spec for default seems kind of weird though.
Great job AMD. You need to expect noise and heat when dealing with a card that beasts out that kind of performance, it's part of the territory.Reply
This thing is a monster, 375W TDP, 4GB of VRAM! Some people don't even have 4GB of regular RAM in their systems, let alone on their video card.Reply
Did I miss the load power draw? I just noticed the idle and noise ratings. It would be informative to see the power draw of Crossfire 6990s and overclocked i7. I see the graph, but a chart with CPU only and GPU only followed by a combination of both would be nice to see.Reply
For the people that actually buy this card, i'm sure they'll be able to afford an aftermarket cooler for this thing once they come out...Reply
OMG!!! It's finally here.Reply
one-shotDid I miss the load power draw? I just noticed the idle and noise ratings. It would be informative to see the power draw of Crossfire 6990s and overclocked i7. I see the graph, but a chart with CPU only and GPU only followed by a combination of both would be nice to see.Reply
We don't have two cards here to test, unfortunately. The logged load results for a single card are on the same page, though!
things we need to see are this thing water cooled.Reply
and tested at 7680 x 1600
that will see just how well it does.
That thing is an absolute monster of a card.
They really should have made it 32nm. then the power draw would have fallen below 300w and the thing would be cooler.
STILL NICE WORK AMD
Pretty fast i wonder if this will be cheaper then 2 GTX 570's or 2 6950's?Reply
But omg this thing is freakin loud. What's the point of having a quite system now with Noctua fans :(
Its hot, sucks alot of power, and costs a ton. But i still want one.Reply