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GPU not getting power in new system

post #1 of 6
Thread Starter 
Hello all,

My old computer crapped out on me, thinking it was the video card. So I finally built a computer that I had planned for about a year. Here's the parts:

PSU: Corsair TX650M
CPU: AMD FX-8120
MOBO: ASUS Crosshair V Formula-Z
VID: HIS IceQ X Radeon 7850
COOL: Antec Kuhler 620
RAM: Kingston HyperX 4x8gb

And I used the harddrives from my old computer, a 320gb SATA, 750gb SATA (might be SATA2 but that is probably irrelevant), and 1.5tb SATA2.

I bought all the new components at a computer store where they loaded the RAM and CPU into the mobo and checked for proper performance, using a stock heatsink. They brought it back saying it was OK.

I got home and assembled everything, but when I go to power on, the computer shuts itself off after a few seconds. The GPU fan does not turn on, nor does the fan for the Antec Kuhler (and presumably the pump).

There is clearly power to the system, as the red etching on the Crosshair lights up fine, and I can hear (at least one of) the harddrives powering on since the rest of the system is dead quiet.

I have searched many forums, tried resetting the CMOS with the jumper, swapping out RAM sticks, and still I am not getting power to the GPU or Kuhler.

Any ideas? I am fairly busy and would hate to disassemble and return parts considering they tested the RAM/CPU in the store.


Thank you and hopefully I can get this working!!
post #2 of 6
First check with another psu. if the problem remains you will have to check with another graphics card. if the problem still persists check the motherboard and RAM.
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

First check with another psu. if the problem remains you will have to check with another graphics card. if the problem still persists check the motherboard and RAM.

First off, I should note that the new PSU only has a 24-pin and 8-pin connector, and the old PSU has a 24-pin and 4-pin. The manual for the mobo says to make sure the 24-, 8-, and 4-pin connectors are fastened properly.

I switched to the old PSU, and still no power to the GPU or Kuhler. Then I put in the old GPU with the old PSU, and got power to the GPU (still none to the Kuhler), but no video signal as I think the old GPU is fried.

Conveniently I bought the replacement plan on the mobo, GPU, and PSU, but I just don't know which one to take back....
post #4 of 6
sounds like a CPU error if doesn't go beyond 3 seconds. Make sure ALL power lines to the mother board are hooked up and NOT the lines that are tagged PCIe on the cable harness. These are for the GPU and are wired in opposition.

Also check that you didn't bend pins when installing the CPU chip itself
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simple stuff
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post #5 of 6
Thread Starter 
The PSU is modular, and the PCIe 6-pin connectors are not plugged into the PSU. When I hooked up the old PSU, it did stay running for a few minutes before shutting off, and the people in the store put the CPU in and tested it so hopefully it's not the CPU.

I put the new GPU in my old mobo setup, and there was still no power to it, so I'm guessing it's the GPU that's faulty. Will return tomorrow and post an update here.

Thanks so far for the tips
post #6 of 6
Thread Starter 
Sorry folks, I must apologize for being an IDIOT. When I first put the computer together, I looked over the video card to check for the 6-pin connector. I didn't see it, so I proceeded as usual.....after boxing it, and looking around online, I realized there IS a 6-pin connector on the video card.

Everything is working fine now, except a problem with the harddrives but that shouldn't be too hard to figure out.

Thanks! smile.gif
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