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Computer won't boot when graphics card is installed

I was sick of of my Wi-Fi cutting out on my PC and I saw that it was because of the graphics card heat towards the Wi-Fi card.
So I take out my GTX 650 and put it back in into a different PCI slot, then I plug everything in and it won't boot, a fan won't even budge. The power light on the motherboard goes on and when I try to power up it has briefly a 6 I think.
I was going to get a new graphics card anyway, so today I bought a 670 by GIGABYTE also. By the way PC specs are
Core i7 3770
16GB Corsair Vengeance 1600mhz DDR3
GTX 670 OC
GIGABYTE GA-Z77X-UD3H.

I now get the same experience with the 670 and nothing budges, weird enough when I take the card out it boots up fine. There was a update for the BIOS which I did thinking it would fix the problem. I took out the CMOS battery too for 10 minutes and chucked it back in, nothing. I have tried so many different things. I am computer savvy but am not a full enthusiast.
It is odd that no video card works in it all of a sudden, all cables are in their required positions. Currently the computer is turned on without the graphics card installed.
If you need any further info I will be happy to give it along. :)

P.S how stupid was I to forget this, I am using a CoolerMaster GX-750W power supply.
6 answers Last reply Best Answer
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  1. Best answer
    Have you tried booting with your graphics card in the original PCI slot? And did you originally have your wifi card in a slot above or below your graphics card?
  2. thismafiaguy said:
    Have you tried booting with your graphics card in the original PCI slot? And did you originally have your wifi card in a slot above or below your graphics card?


    I had the wifi card on top, I will try to take out the wifi card and see if there was any interference with the 2, although I doubt it. I even tried using a Legacy boot instead of UEFI? Still no luck, I tried putting in a different PCI slot then it goes on for about a millisecond then shuts back off and nothing.
  3. How old is your power supply? Can you borrow another one from a friend and test your system with that?
  4. thismafiaguy said:
    How old is your power supply? Can you borrow another one from a friend and test your system with that?


    It is about a year old, along with all the parts on my computer, now that I think about it, probably about 9 - 10ish months old. CoolerMaster are supposed to be reliable so that is why I went with it. I am wondering if it may not have enough juice?
  5. thismafiaguy said:
    How old is your power supply? Can you borrow another one from a friend and test your system with that?


    After rining a localish PC shop they said it definately sounds like something in the BIOS or the PSU. I am in 2 minds in which it is because it really looks like it isn't getting enough juice but it worked perfectly fine before. They said it will be a base fee $50 and whichever they need to put in the PC afterwards, what do you think?
  6. See if you can borrow a known working power supply from a friend, you can buy a pretty decent 600W power supply for $70, I would recommend Corsair or Seasonic for reliability, but any company can make defective products.
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