New build, no signal to monitor.

Tried changing out video card to radeon video card and it works. But when I put my Nvidia back in im getting a black screen no signal on monitor. I have a MSI 990FXA-GD65 motherboard and a Nvidia Geforce GTX 660 TI FTW 3GB video card. Oh, and i've also updated drivers and flashed my bios to newest version with the other video card plugged in. PLEASE HELP!!!
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  1. Does your Nvidia have the two 6 pin power connectors and are both connected?
    Little confused by your post....did you uninstall the drivers before switching cards?
    What do you mean by changing out video card to radeon but Nvidia doesn't work when I put it back in????
  2. ^ 100% agree with him

    and this one is really long troubleshooting but it can save you from getting headache
    http://www.tomshardware.com/forum/261145-31-perform-steps-posting-boot-video-problems
  3. Sorry about that what I meant to say is, my mother board is a MSI 990FXA-GD65. I just purchased all new components to build a new computer. I put everything together and the computer comes on but just a black screen on the monitor. I swapped out the new Nvidia Geforece GTX 660 TI FTW with one of my old Raddeon 6950 and the computer comes on and boots windows. I swapped back to the Nvidia and all I get is a black screen. I put the Nvidia in my old computer and it works, so I know I didn't buy a bad card. Just was wondering what could cause this.
  4. What are your full specs. If you have a no-name PSU give us the specs off the side from inside the case.
  5. Amd Phenom II x4 3.4ghz cpu
    16GB DDR 3 Ram
    Nvidia Geforce GTX 660 TI FTW (Video Card Giving me the problem)
    Coolmax 1200w PSU model ZPG-1200B
    The +12V1 has 100A on a single rail
  6. So let me get this right, did you re-use a hard drive in this build that already had windows? If so that may be your problem. I'd reinstall windows from scratch and get all your drivers right.
  7. Yes I reused my HDD. I can't even get the motherboard logo to boot up on the screen, it just stays black while I have the Nvidia card in, so I can't even get into the bios or boot from disc.
  8. And the radeon was installed on a different computer than the one I got the HDD from, so it worked without having the dirvers installed.
  9. I just don't understand why The Radeon card works and not the Nvidia one. The Nvidia card works on a computer with an older motherboard than the one I bought.
  10. Humm. If you remove the hard drive can you get into BIOS with that card? If so reset to defaults and try again.

    You could put the hard drive in another computer and delete the partition. That would eliminate any conflicts with the old os.

    Also, as big as it is, Coolmax power supplies have received terrible reviews generally. Try your other power supply in that thing.
  11. Ok, I'm gonna try a different PSU, I'll get back to you in like 10 mins. Thanks for helping me.
  12. I tried a different power supply and unplugged the hard drive. Still didn't work.
  13. That's a drag! I'm sorry we haven't been able to help you. I'm going to suggest you review this post and carefully go through the steps (I know you have already done most of them) but be patient. Either you will find a way to get it running or you will decide the GPU and motherboard don't work together.

    http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
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