Topic Title: PC doesn't boot with HD7970
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Created On: 10/31/2013 03:38 PM
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 10/31/2013 03:38 PM
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Compizfox
Peon

Posts: 40
Joined: 11/19/2010

Hi guys,

 

I've a problem. I just bought a HD7970 DC2 second hand. It appears to be in good condition but my system doesn't work with it.

 

Specs:

  • Intel 2500k
  • Asus P8P67-m Pro
  • Cooler-Master GX550 PSU

My system won't POST with the HD7970 installed. Normally it will beep one time (to let you know everything's OK), but it doesn't do that now. The PC just turns on, but nothing happens. No POST, no signal on my monitors, no beeps at all, but fans are running.

My previous video card was a HD6950, but that one died. I don't have onboard video but the system boots OK with a spare card (HD4650).

Of course I connected the 2x 8-pins PCIe-power. Without those, the leds on the card turn red and I do actually hear beaps: 1x long, 3x short which, if I'm correct, means "graphics error". That makes perfect sense, of course.

I tried:

  • updating my motherboard BIOS
  • clearing my motherboard BIOS
  • another PCIe slot
  • flipping the BIOS switch on the card

I hooked up a multimeter and it's readings are OK: A stable 12,10 volt on the +12V rail.

I've ran out of options hear, I seriously don't know what I can try, so I'm suspecting my PSU. I think it should be enough (it as a single +12V rail rated 44 A) but it's that, or the video card is defect.

How can I make sure it is (or isn't) my PSU? Does the fact that my voltages are stable mean it can't be the PSU?

I do not have a better PSU so I can't really test. I don't have another system that could fit a HD7970 either.

 10/31/2013 10:25 PM
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Vantharas
Sprite Maker

Posts: 3496
Joined: 03/01/2009

You need to find another system that will fit it then, or take it to a friends house. If its not posting with it the card is either A. Bad. Or B. Your motherboard is having an issue with it for some reason.

which that board shouldn't. 



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