CrossfireX not working

[heatfanman]

I just recently installed a second HD 6950, but every time I start crysis it crashes. It crashes on other games too, but will work for 5 or so minutes. Also, my sound isn't working, all I hear is a buzzing sound. I'd greatly appreciate any help.

My mobo is MSI P67A-GD65.

 

[heatfanman]

11.2 I think

 

[heatfanman]

drivers didn't help. I took out the second card, hoping the problems would be fixed. Still crashing, still no sound. I think I messed up big time. I should've just stuck with one card.

 

[heatfanman]

I tried re-installing the first card, but it is still crashing and there is still no sound.

 

[heatfanman]

I'll try that, will it also fix my sound problem? Did I fry my built-in sound card or something?

 

[heatfanman]

OK, I wiped all my drivers, still not working. I may just give up and pray my friend can this this.

 

[bradkman]

What power supply do you have installed? Your power supply could be the problem.

 

[heatfanman]

Antec TruePower New TP-750

 

[heatfanman]

Any help with my sound problem? I think one card may be working, becuase I tried a few games and they worked, but not Crysis. It was working before I tried putting in the second card, should I re-install it. First I need to get my audio fixed. Is my sound card dead?

 

[bradkman]

Any help with my sound problem? I think one card may be working, becuase I tried a few games and they worked, but not Crysis. It was working before I tried putting in the second card, should I re-install it. First I need to get my audio fixed. Is my sound card dead?

Did you get the control panel under the "Sounds" and make sure your sound card is the default? When I've had ATI cards in the past, sometimes it would set my video card as the default for sound, because of the HDMI output from the video card. Once I set my sound card to the default, I'd get sound again.

BTW, that power supply should work fine, but you never know. The only time I've had problems with system crashes, similar to the crashes your experiencing, it's been a power supply issue. The sound card issue wouldn't be a power supply problem.

 

[leon2006]

Antec TruePower New TP-750

Calculate your load
http://www.antec.outervision.com/

750 for crossfire...depending on what other stuff you have this may not be sufficient.

Go to computer store and try out 850W or bigger supply. Best Buy or Frys (if in US) provide 30 days for you the return it. Its easy to try so you can rule it out as a potential cause.

I have CF 4890 and i use Antec 850W True Power when i started.