GPU & PSU won't work together

By BMfan
Jun 24, 2011
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  1. HI Guy's

    I'm hoping someone here can help me.

    I've just bought myself a Corsair TX650v2 to replace my Zalman 400w psu but for some reason when i plug the Corsair into the ATI 6790 i can't see anything on the screen.The PC runs like it should,the hdd's start working and the fans kick in but nothing on the screen.As soon as i plug the Zalman back the card works like normal.
    I have tested with a Gigabyte 550GT PSU / a generic 200\300w PSU and a corsair TX 750 and the card will display like normal.
    I've been back to the suppliers with the psu and gpu where they tested using a antec 1000w psu and another TX650v2 and the card displayed nothing again.
    They say the card has an intermittent problem.

    I have had this card for a month and it has never once stopped displaying anything
    until i plugged in the TX 650v2 but as i said when i plug back the Zalman psu it works like it should.

    The main problem is that the supplier wont take the psu back because it works(just not with my card) and i'm worried that if i send the card in they will test it and it will work fine for them.

    Does anyone know of anything i could try that might get the GPU and PSU working together?

  2. hellokitty[hk]

    hellokitty[hk] Hello, nice to meet you! Posts: 3,435   +145

    Actually no.
    Since it works with other ones, I'd assume you plugged everything in properly.
    Interesting issue...I wonder what it could be.
  3. BMfan

    BMfan Topic Starter


    Just to make sure,i used my friends media PC and his Gaming rig as well,with the Corsair and GPU and nothing but as soon as i plugged in the PSU from each PC then the PC's booted up like it should.If i took out the GPU but left my PSU the PC would boot fine.
    Right now i'm on my PC with the Corsair but am using my old 4770 so i can at least use my PC.

    Luckily i shave my head,been trying everything for the last 3 nights.
  4. hellokitty[hk]

    hellokitty[hk] Hello, nice to meet you! Posts: 3,435   +145

    Uhm...that sounds unnecessarily complex.
  5. BMfan

    BMfan Topic Starter

    Thanx for the reply.

    I had to stop the card from working then sent it in and paid the difference for a gigabyte 6850.
    For some reason the club3d 6790 didn't like the Corsair TX650.

    I always check what eXtreme Power Supply Calculator Lite v2.5 before i buy a psu or gpu and sometimes just to mess around.

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