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6990 or 2x6970

post #1 of 21
Thread Starter 
as the title suggests, I want fast, and a lot of it. is it smarter to get two 6970s or to wait until 6990s are back in stock on the egg (gift certificate)
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H.A.L.
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post #2 of 21
I'd go for the 6990 since your sig rig has a 5970. Makes sense to me to keep it similar to what you have already, unless you want to explore that is.
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post #3 of 21
get 2 670's as 6990 is just two 6970's downclocked, 6970x2 overclocked would kill a single 6990 period, as they say 2 is better than one wink.gif
    
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post #4 of 21
Thread Starter 
space and power consumption are no issue, Ive got the space and the mb to run tri fire if need be, this is a pure performance question.
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H.A.L.
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post #5 of 21
Quote:
Originally Posted by Firebeard;13496094 
get 2 670's as 6990 is just two 6970's downclocked, 6970x2 overclocked would kill a single 6990 period, as they say 2 is better than one wink.gif

It's not the 5970 vs 2X5870 anymore. AMD did a much better job with the 6990. So no ''killing'' here at all. smile.gif

You can often OC the 6990 cores HIGHER then 2X6970. I know, I have 1 6990 and 2X6970.

So both choices are good, and practically the same.
    
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post #6 of 21
I got a 6990 last night for a friend to run eyefinity with and it's horrible!! He had the 5870 1gb Asus card. Now he's barely getting any better performance. I think he would have been better with 2 6970's instead. We tried 2 6850's first and that was getting higher fps than the 6990 is getting. What's up with that.

We tried running some tests in Crysis 2, he's in Eyefinity @ 5760x1080 and I'm in Surround at 5760x1080. Both on Extreme settings.
6990 gets 30-36fps
3 480's gets 65-95fps.

I was about to sell my tri sli and get a 6990 and that isn't happening for sure now.

Something is strange. The 6850's should not be getting better performance than a 6990.
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post #7 of 21
@Hambone

It's either overheating, a bad card or bad drivers.
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post #8 of 21
Quote:
Originally Posted by Hambone07si;13499590 
I got a 6990 last night for a friend to run eyefinity with and it's horrible!! He had the 5870 1gb Asus card. Now he's barely getting any better performance. I think he would have been better with 2 6970's instead. We tried 2 6850's first and that was getting higher fps than the 6990 is getting. What's up with that.

We tried running some tests in Crysis 2, he's in Eyefinity @ 5760x1080 and I'm in Surround at 5760x1080. Both on Extreme settings.
6990 gets 30-36fps
3 480's gets 65-95fps.

I was about to sell my tri sli and get a 6990 and that isn't happening for sure now.

Something is strange. The 6850's should not be getting better performance than a 6990.
Something is wrong then. The 6990 isn't horrible, you just did something wrong when installing it.
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post #9 of 21
Quote:
Originally Posted by Devilmaypoop;13499603 
@Hambone

It's either overheating, a bad card or bad drivers.

it's not overheating. BBC2 seems to run ok but Crysis 2, Dirt 2 are bad. it's only getting to 75c on both cores. I tried using Msi AB with the 6990 and that was causing major problems with flickering. Is there another program that overclocks the 6990's good?

going to open my own thread on this one.
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post #10 of 21
Quote:
Originally Posted by Stefy;13499622 
Something is wrong then. The 6990 isn't horrible, you just did something wrong when installing it.

This.

OP, I'd say get the 6970s. But first, you need to upgrade your current platform. You're gonna get some bottlenecks with that CPU (even though I see you're running three displays).
    
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