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Need Help with Crossfire

post #1 of 10
Thread Starter 
I recently bought a 4870x2 to crossfire with my 4870 1GB.
The price was too good to give up.
I have had a few minor glitches with it (there is a clicking sound that sounds like the fan it hitting a cable, but there is nothing even close to it...) but overall it seems to be working just fine.
I need to know how to test it out to make sure its running as a triple crossfire and not just double. I'm not at all used to the new CCC.
Everest says that crossfire is enabled and it says this -

4800 Series
4870 x2
4870x2
Crossfire enabled

*Forgot to mention GPU-Z says crossfire disabled*

the "4800 Series" has one bios number, and the two 4870x2 entries have a different bios number (identical to themselves obviously).

I know Windows Experience Index is a crap bench, but im curious as to why it went from 7.4 with the one 4870 to 7.1 with all three....
I game at 1080p one a single monitor. rest of my specs are below.

How can I make sure its running as a 3x 4870?

thanks in advance
Edited by FXTOi7 - 2/25/11 at 4:28pm
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post #2 of 10
I doubt your PSU can handle 3x 4870? That might be why the score went down. You also went from 2GB Vram to 1GB.
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post #3 of 10
Same happened to me. WEI went from 7.9 with one 6950 to 7.8 with two of em. I wouldn't worry about it.

Use GPU-Z to check to see if crossfire is enabled or check in CCC. In 11.2 it is under the Performance tab: AMD CrossfireX Configuration. Or like I said download GPU-Z.

Quote:
Originally Posted by Stefy View Post
I doubt your PSU can handle 3x 4870? That might be why the score went down. You also went from 2GB Vram to 1GB.
No he didn't? Each core on the 4870X2 has 1GB of VRAM. Not two each. He stayed the same.
    
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post #4 of 10
Windows Experience Index is slightly moronic that way...doesn't seem to understand Xfire/SLI too well.
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post #5 of 10
Thread Starter 
Max wattage consumed by 3 4870s is suppose to be 390 watts.
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post #6 of 10
Quote:
Originally Posted by Senator View Post
Same happened to me. WEI went from 7.9 with one 6950 to 7.8 with two of em. I wouldn't worry about it.

Use GPU-Z to check to see if crossfire is enabled or check in CCC. In 11.2 it is under the Performance tab: AMD CrossfireX Configuration. Or like I said download GPU-Z.


No he didn't? Each core on the 4870X2 has 1GB of VRAM. Not two each. He stayed the same.
Ah, yes. My bad.

But still, the PSU might be too weak.

If I remember correctly from those old reviews, most recommends a 700W for the 4870x2. Pop in another 4870 and I believe this is too much.
Edited by Stefy - 2/25/11 at 4:36pm
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post #7 of 10
Would it be worth it to try out different CCC releases?
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post #8 of 10
Pretty sure wei doesn't rate CFX, only single cards.
So the drop came from the X2 now being the primary card with slower default speeds, that is unless you ran the test at the same speed as the previously installed 4870.
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post #9 of 10
Thread Starter 
OK so i finally got things working fine.
My 3D Mark Vantage scores are -

GPU - 20800
CPU 11,000

Are these decent scores?

thanks
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post #10 of 10
If thats with performance my 1GB 4870 Scored 'bout 10k
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