XFX Radeon 6770, No video when trying to boot up!

Hello,

I just upgraded my pc with a Phenom II X6 1055T and a XFX Radeon HD6770. Before I was using a Phenom II X4 840 and a Radeon HD5670. I also have an Antec Earthwatts 650 watt power supply. The power supply is about 3+ years old. I have previously connected a Geforce 8800GS to the 6 pin connector on the power supply and it worked fine for the years I had it. Now when I connect the HD6770 to the power supply it will not show video, but the fan will spin. The pc will boot up to the motherboards on board video when I disconnect the 6 pin connector from the 6770. I was wondering if the power supply has worn out so much that it would no longer support a video card that requires the 6 pin connector.
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More about radeon 6770 video boot
  1. I doubt it's the PSU. If the system works with graphics card A, but not with graphics card B, I'd say card B was defective.
  2. did you install drivers?
  3. It doesn't matter if josiah didn't install drivers.Should see something, if only boot text messages.

    First thing to do is to test the card in another computer to see if the card is working.

    A 6770 only needs about 8 amps - about 4 amps more than a 5670. I doubt if the PSU is the problem.
  4. josiah1983 said:
    Hello,

    I just upgraded my pc with a Phenom II X6 1055T and a XFX Radeon HD6770. Before I was using a Phenom II X4 840 and a Radeon HD5670. I also have an Antec Earthwatts 650 watt power supply. The power supply is about 3+ years old. I have previously connected a Geforce 8800GS to the 6 pin connector on the power supply and it worked fine for the years I had it. Now when I connect the HD6770 to the power supply it will not show video, but the fan will spin. The pc will boot up to the motherboards on board video when I disconnect the 6 pin connector from the 6770. I was wondering if the power supply has worn out so much that it would no longer support a video card that requires the 6 pin connector.

    You will need to disable the onboard video before it will display through the discrete card
    that can be taken care of in the bio. On some occasions a jumper may be involved but I've only seen that once.
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