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Radeon 6990 vs. two 5870's crossfired

post #1 of 14
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I have a question that I realize may not be able to be answered as of yet because I haven't seen any benchmark info in regard to the 6990 (with the exception of something that I saw from AMD, but I think that was vs Nvidia's GTX 580.)

But I persevere anyway. I currently have two Radeon 5870's crossfired, and am running eyefinity (3 monitors res. 5760 x 1080). I'm considering the purchase of the Radeon 6990 when it becomes available, but want to know if this one card with two GPU's will do a better job working with eyefinity than my crossfired 5870's.

Thoughts?
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Uber Air Flow
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post #2 of 14
A 5970 is basically two downclocked 5870s on one PCB, so the 6990 should be faster than your current setup.

Although it's hard to tell, as obviously there are no benchmarks as of yet.
    
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post #3 of 14
6990 will beat the 5870 CF.
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post #4 of 14
actually a 5970 is 2 downclocked 5850's
post #5 of 14
Quote:
Originally Posted by CrazzyRussian View Post
actually a 5970 is 2 downclocked 5850's
It's two down clocked 5870's.

If the 6990 is going to be two down clocked 6970's then it will be faster then 2x 5870's.
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post #6 of 14
Quote:
Originally Posted by CrazzyRussian View Post
actually a 5970 is 2 downclocked 5850's
^ what he said.
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post #7 of 14
Quote:
Originally Posted by CrazzyRussian View Post
actually a 5970 is 2 downclocked 5850's
How is it downclocked when it runs at the same clocks as the 5850? And has 3200 shaders, 1600 per core (The amount a 5870 has).

@OP apparently a 6990 runs at 6950 clocks but can be switched to OC mode (second bios ) to 6970 clocks so expect stock performance to be between 6950 and 6970 CF when in stock mode.
    
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post #8 of 14
Quote:
Originally Posted by CrazzyRussian View Post
actually a 5970 is 2 downclocked 5850's
its two downclocked 5870's that are clocked at 5850 speeds for heat and power issues!
post #9 of 14
Quote:
Originally Posted by F-U-B-A-R View Post
^ what he said.
You're both wrong.

If it was two down clocked 5850 GPUS then it would only have 2880 SP's, Which it doesn't. It has 3200 SP, thus having same SP count as 2x5870s. This only indicates the 5970 uses 2 5870 gpus. But they are running at lower frequencies, giving performance roughly around 2x5850 @ stock.
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post #10 of 14
HD 69XX Scale batter, DX11 Better and 2GB which will help in your resolution.
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