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3 x 3gig Gtx 580 Lightning or 2 x AMD 6990

post #1 of 43
Thread Starter 
Which is better for raw graphics power when running very high res displays,

Thanks,

CT
post #2 of 43
Hmm, I'm leaning towards crossfire 6990s on this one, but Tri-SLI GTX 580 does sound tempting.
   
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post #3 of 43
The 2 x 6990 is equivilent to 4 GPU's, while the 3 x GTX 580 is only 3.

The 6990 should be quicker, but honestly, I'm not sure I'd go with either of them. The scaling at that level will be horrid.
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post #4 of 43
The 3x 3GB lightnings due to more Vram and you don't have to deal with 4 GPU scaling problems.
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post #5 of 43
Quote:
Originally Posted by driftingforlife View Post

The 3x 3GB lightnings due to more Vram and you don't have to deal with 4 GPU scaling problems.

?? Doesn't the 6990 have 4 gb's of ram each? Besides the fact that in sli/cf it only uses the memory off the first slot card.
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post #6 of 43
personally i'd go 580 route. I have a 6990, and 2x 7970s and amds drivers are just horrid bluescreening at least once a day right now because of them.... going back to nvidia first chance i get...
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post #7 of 43
3 x 7970 is better.
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post #8 of 43
Quote:
Originally Posted by Cape Cod View Post

?? Doesn't the 6990 have 4 gb's of ram each? Besides the fact that in sli/cf it only uses the memory off the first slot card.

It's 4GB on the whole card, 2GB per GPU. It's still 2GB of vram usable, but they like to use marketing tactics to make it sound better. Same applies to the 3GB 590, which is 1.5GB/GPU.

IMO three 580's would do better, if you've got the supporting cooling to handle that.
post #9 of 43
GTX580's simply because of the current price reductions they have, 7970's are far more expensive.
 
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post #10 of 43
Quote:
Originally Posted by Methos07 View Post

It's 4GB on the whole card, 2GB per GPU. It's still 2GB of vram usable, but they like to use marketing tactics to make it sound better. Same applies to the 3GB 590, which is 1.5GB/GPU.
IMO three 580's would do better, if you've got the supporting cooling to handle that.

^this.
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