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GPU fan pulses and no output

post #1 of 7
Thread Starter 
Somehow, I think this is a PSU issue... somehow. anyhow, when i turn on the computer, everything turns on fine, the fans, hard drives, etc.... but the GPU fan pulses up and down in RPM. I used the motherboard/cpu/psu for about a year for gaming with a couple 6950s but I'm coming to realize that I don't game much more than RPG/MMO and I don't really need that sort of power in terms of graphics (nor a personal heater in the bowels of east texas). I've already re-seated the graphics card and ram and removed a PCIe x1 raid card in case that was the issue.

PSU: Corsair 750TX
MB: ASUS M4A79T Deluxe
CPU: AMD Phenom II x4 940 (heatsink: Noctua NH-D14/case: HAF 932)
GPU: MSI GT 430


any ideas, suggestions, free movies or drinks are greatly appreciated.
Edited by a10112 - 11/20/11 at 10:11pm
post #2 of 7
I'm assuming that it's not actually getting through the POST and booting your OS. Is that correct?

If so, have you tried clearing the CMOS just to see if that solves it?
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B2
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post #3 of 7
I dont think it is your power supply... I would think if it was a PSU problem it wouldn't even do that much... I think it may be the card itself... if you have to resources... try putting the card in another computer or try finding a way to test your power supply... You can get decent cheap testers at a lot of computer shops... But I still think it is the card itself if it used to run everything else just fine...
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Blue SB Dragon
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EVGA 9800GT Corsair  LITE-ON 20X DVD±R DVD Burner with LightScr Custom water cooling 
OSMonitorKeyboardPower
Windows 7 Professional 64bit Acer AL2002W Logitech G15 v1 PC-P&C 750 Quad 
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post #4 of 7
Thread Starter 
update: it's the motherboard. well, no, not specifically. it's the motherboard's way of powering everything. the HAF 932 has 3 huge >200mm fans and it looks like i can't power the fans AND the GPU at the same time through the mother which explains why this issue didn't arise when i had the 6950s in since they're powered seperately. imma go look for those molex->fan adapters and I'll check back in a few.
post #5 of 7
Thread Starter 
Quote:
Originally Posted by [ISM]-BlueDragon View Post

I dont think it is your power supply... I would think if it was a PSU problem it wouldn't even do that much... I think it may be the card itself... if you have to resources... try putting the card in another computer or try finding a way to test your power supply... You can get decent cheap testers at a lot of computer shops... But I still think it is the card itself if it used to run everything else just fine...

i should have explained that this is a "downgrade" of the sorts. I'm moving from a dual core/gt430 to a quad core/gt430 since it'd be a nicer blend of power instead of the lopsidedness i had with the gaming rig and my normal computer. what i did was: remove the 6950s and stick in the GT430 as well as the D14 cooler. i had no idea that the motherboard wouldn't actually be able to power the card and the fans, it never came to mind.
post #6 of 7
Not the power supply. Probably an issue with the GPU or motherboard, but I guarantee you not a PSU issue.
post #7 of 7
Thread Starter 
i think i have it figured out. the motherboard only sets the PCIe lanes to 25W because it was really only meant for the larger/high-end cards that use PCIe power from the PSU. I got it running somehow and brought the PCIe power to full 75W (max).
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