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Graphics card doesn't work?

I recently purchased an Gigabyte GTX 670 Graphics card but it doesn't work on windows 8. I get a black screen which says no signal.

The card however, does show up on Device manager and I've updated all of the drivers and software's correctly. But now when I plug in HDMI it still says no signal. I tried to load bios and change primary display to PCI-E but it still didn't make any difference.

When I use onboard Graphics it seems to work fine.

Please help me as I have no idea anymore on how to solve this problem.
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  1. Best answer
    Use a Dual Link DVI cable. And did you plug the PCI-E connectors(6 pin/ 8 pin) to the GPU from PSU ? What is the PSU you are using ?
  2. lonewolf7 said:
    Use a Dual Link DVI cable. And did you plug the PCI-E connectors(6 pin/ 8 pin) to the GPU from PSU ? What is the PSU you are using ?


    This is the exact PSU I bought the other day:

    http://www.ebay.co.uk/itm/251278674016?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

    I can plug in the 8 pin directly from the PSU as there is a 8 pin wire but the 6 pin with the molex connectors (both 6/8 pins came with molex).

    Everything is installed but the display shows no signal
  3. I am afraid that is not a good PSU. It has only one 6 pin PCI-E connector. You have to plug both 6 pin and 8 pin connectors directly from PSU and not with a Molex adapter. The GPU is not getting enough power to run so you are getting "no signal" .

    Buy a good/rated PSU to work things properly. Two good PSU's : http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014

    You can go with either one.
  4. lonewolf7 said:
    I am afraid that is not a good PSU. It has only one 6 pin PCI-E connector. You have to plug both 6 pin and 8 pin connectors directly from PSU and not with a Molex adapter. The GPU is not getting enough power to run so you are getting "no signal" .

    Buy a good/rated PSU to work things properly. Two good PSU's : http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014

    You can go with either one.


    Thanks, will try it. I'm just wondering why 6 pin/ 8 pin molex connectors came with the GPU if it won't work in the first place?
  5. Cheap PSU manufacturers sometimes do this to fool us. And sometimes it will work but eventually it will fail and the worst case scenario it will take other components with it.
  6. I got it working! It wasn't the power supply after all. It was actually the DVI-D cable that you suggested. At least it saved me $69
  7. Glad to hear its working.
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