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Horrible FPS and no sound in game - Crossfire 5850s

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August 17, 2011 6:15:57 PM

I just added a second Sapphire HD 5850 Xtreme to my system yesterday. The Crossfire bridge is connected. My MOBO is a MSI 870-G45.
I went through the automatic setup through CCC. Everything seemed ok. I fired up Battlefield, Bad Company 2 to test out my new setup and it wouldn't play sound! I restarted my system, tried again. No sound in game. I have sound in Youtube and whatnot though... So I figured it was the game. I fired up Brink, and no sound either. So I went back into Bad Company to with FRAPS on to see if my frame rate was at least decent. Loaded into a match and found that my FPS would only go up to the mid 20s and would drop down to 5 FPS under light load!!!
I tried reinstalling drivers and any patches I could find. What is going on?!?! I thought Crossfire was easy and plug and play.

Please help guys. I'm starting to get disheartened.
August 17, 2011 7:25:58 PM

Oh ya, Corsair Builder Series CMPSU-600CXV2 600W ATX Power Supply Active PFC 120MM Fan power supply
August 17, 2011 7:38:05 PM

It could be your PSU.Those CX series from Corsair is more for the budget builder and isn't some of their quality units.It's acutally only capable of deliever 480 watts.And a typical system power draw with a 5850 crossfire is right around 470 watts.

What are your full system specs?
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August 17, 2011 7:42:38 PM

the second slot on that board is 4x not 8 or 16. what that will do to xfire I don't know but I don't think it would be primo. BBC2 is good on a quad core, don't know what you run it on. Brink I don't know. PSU has 45amps. might not be enough. ( forget the "watts" thing )
August 17, 2011 7:50:46 PM

Has anyone had issues with no sound in game while in crossfire? It seems kinda weird that there is sound in windows but none in game.
August 17, 2011 8:19:34 PM

What are your full system specs? (CPU,RAM,Mobo,etc.)

All of this could easily be cause by incifient power.
August 17, 2011 8:24:51 PM

-AMD Phenom II 810 quad core cpu 6mb cache 2.6 (Overclocked to 3.2 stable)
-2x4GB Corsair vengence 1600
-1 TB Seagate 7200 rpm hard drive 32mb cache
-Sapphire HD 5850 Xtreme video card 1GB ddr5 (725 core/4000 mem) X2 Crossfired
-MSI 870-G45 MOBO
-Corsair Builder Series CMPSU-600CXV2 600W ATX Power Supply Active PFC 120MM Fan power supply
-120mm silverstone rear fan, 120mm 3 speed front fan
August 24, 2011 5:42:37 PM

It turns out it was bad drivers or dirty windows, or both. I formatted and reinstalled Windows 7 and all drivers. It works awesome now! 100 - 130 FPS in Medal of Honor, 80 - 90 FPS in Bad Company 2! Thanks for your input guys.

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August 24, 2011 6:24:28 PM
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Welcome.Glad you got it fixed.
August 31, 2011 1:45:32 AM

Best answer selected by Full_out.
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