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Help! Radeon 6850 not working!!

Last response: in Graphics & Displays
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February 24, 2012 12:32:03 AM

430V power supply, biostar N68S3+ mobo

An older Radeon 5670 works fine. Card tested in another PC, also works. Tested 2x 6850, can't get 'em going. Any recommendations or knowledge of where my failure is occurring? Will not detect card in device manager.

More about : radeon 6850 working

a b ) Power supply
February 24, 2012 12:44:00 AM

not sure on that board but have you tried a BIOS update? some boars need one to handle pcie 2.1 cards
February 24, 2012 12:47:33 AM

bios update is a good idea, I think I used the ordinary drivers CD after install. Keep the ideas coming, trying that one now.
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February 24, 2012 12:49:17 AM

Power supply is rather low. I think the requirement is 450w for the 6850. And I looked up your mobo, it seems to not support crossfire. and make sure your drivers are installed correctly.
February 24, 2012 1:07:39 AM

im having the same problem man, my psu and gpu are the same. I just ordered a 750w psu so hopefully that will fix my problem, I'll post here if it does. I have found little help on this matter, yet a lot of people having same problem.
February 24, 2012 1:09:11 AM

Updated the bios, no luck =/ Crossfire support not needed for this build, it's a budget for sure.

Would fan on video card be operating if it were not getting sufficient power?
February 24, 2012 1:41:58 AM

ses5152 said:
Updated the bios, no luck =/ Crossfire support not needed for this build, it's a budget for sure.

Would fan on video card be operating if it were not getting sufficient power?

Oh, did you mean you tried 2 different 6850's at different times? Thought you meant you tried crossfire. The fan would probably not spin if there was a lack of power, or would spin slowly.
February 24, 2012 1:44:35 AM

joshernater9 said:
Oh, did you mean you tried 2 different 6850's at different times? Thought you meant you tried crossfire. The fan would probably not spin if there was a lack of power, or would spin slowly.


It's cruising pretty fast...
February 24, 2012 1:49:58 AM

Do you just see a black screen? Have you tried using DVI instead of HDMI or vise versa? Have you tried a different monitor?
February 24, 2012 1:51:55 AM

I have tried the video card in a different computer with all of the above scenarios and all work. This PC will not even show it in device manager.
February 24, 2012 2:00:26 AM

So only YOUR computer won't recongize it?
February 24, 2012 2:10:08 AM

Yes, my other computer works fine with it. Also an AMD build. 700 watt PSU and a good mobo, though...
February 24, 2012 9:39:39 AM

Probably a faulty PCI-E slot have you tried putting other cards in it?
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