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Why is GTX660 not working with this setup?

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  • GPUs
  • Graphics
Last response: in Graphics Cards
December 27, 2013 3:35:52 PM

Hi everyone,

i got yesterday the PALIT GTX 660 gpu. Unfortunately, when i boot the pc, the screen is totally black (the gpu fan starts working though). My setup is:

Mobo: asus P5N73-CM
CPU : intel core 2 duo e7400 2.8 ghz
HD: 1 sata (primary), 1pata + 1 pata CD
Memory: 4Gb DDR2 800
PSU: TAGAN superRock 500w

Is this configuration compatible with the GPU? Am i in for a new mobo? If yes, can anyone suggest one that will work with everything already installed (i don't want to buy a new cpu or dimms).

PS I've already set the primary display adapter in the BIOS to PCI-E.

Thanks a lot.

More about : gtx660 working setup

December 27, 2013 3:43:05 PM

P5N73-CM BIOS 0601
Fix it may take much time to boot with ATI Radeon 5850
make sure it not a bios bug. also check the 12v line on the power supply if the cheap no name unit has more then one 12v rail then the power supply may not be able to power the gpu on. also check that on the video card both power plugs are connected.
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Best solution

December 27, 2013 3:43:37 PM

could be a weak power supply. not all 500watt PS's are equal.

I guess you were using the on board video before? did you hook the cable from the monitor to the card? or is it still on the motherboard?

did you plug power into the new graphics card?
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December 27, 2013 4:58:55 PM

Ii've tried it also with a cheap 650w psu. No deal. Bios rev. is 601 (latest). I was (and still am) using the onboard card. When a connect the dvi to the gpu slot, the monitor says something about going to low-power mode, as if it detects some signal from the card (when i unplug it is shows an animation saying -no signal-). And yew, i have connected the second power supply from the PCI-E cable to the card.

EDIT: Actually my psy indeed has two 12V rails. The rating on the 2nd rail is for 20A, I see now that the card needs 24A rating. Could this be the problem? To start with, is the mobo compatible with the card at all? I wouldn't want to buy a new psu only to find that the mobo is the problem.

swifty_morgan said:
could be a weak power supply. not all 500watt PS's are equal.

I guess you were using the on board video before? did you hook the cable from the monitor to the card? or is it still on the motherboard?

did you plug power into the new graphics card?


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December 27, 2013 5:19:45 PM

i found a supply that said 20amps......... that's what made me think it was the supply. i run a 660 on a supply with 36amps and a few more power hungry things than your box. personally I would never run one so weak.

if you can borrow a better one or try your card on someone else' machine................ ???
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December 27, 2013 5:31:32 PM

I will try it and post back. Its probably the psu. Thanks for your help.

swifty_morgan said:
i found a supply that said 20amps......... that's what made me think it was the supply. i run a 660 on a supply with 36amps and a few more power hungry things than your box. personally I would never run one so weak.

if you can borrow a better one or try your card on someone else' machine................ ???


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December 31, 2013 5:37:21 AM

It turns out that the card was defective. I've replaced it and also upgraded my PSU to Corsair VS650 and runs just fine (well, almost. Had to disconnect my second IDE HDD used for backup in order to be able to boot from my primary SATA disk. Apparently, this card needs a power plant to power it!).
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