Computer fans abrubtly ceased to function

[iBlock]

A few days ago, I bought a new graphics card for my computer: an EVGA GeForce GTX 460. I put it in the computer, and booted up. Everything seemed to be running smoothly, until I checked my temperatures. The processor was running extremely hot. When I looked inside my case, I noticed that none of the fans were turning. I quickly powered off, and put the old card (a Sparkle GT 430) back in. Upon booting, the fans were running. I checked my temperatures, and still everything was running hotter than usual. After about ten minutes, the temperatures were high enough to warrant powering off again. I have no idea what the issue could possibly be. Does anybody have any idea what I could do to fix this?
Here are my specs:
Intel Core i5-760 2.8GHz Quad Core Processor
Asus P7P55D-E LX Motherboard
8GB of Corsair XMS3 RAM
Sparkle GT 430/EVGA GTX 460
1TB Seagate Barracuda Hard Drive
LG DVD Drive
OCZ ModXStream 600W Modular PSU
Cooler Master HAF 922 Case

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[asablief]

A temporary fix which I use a lot is just to pull the cover off the machine and put a large house fan on that will flow directly into the computer and cool everything
but it doesn't always work

[Lugnut]

Maybe you're draining to much power for the graphics card that the fans can't function.

[Nickelob Ultra]

It's possible that could be happening.  I have a 650w PSU powering a Core i7 2.8 GHz, 6GB of 1600 DDR3 RAM, a GTX460, two hard drives and at least three fans, not counting cpu cooler.

If I plug another fan in or another DVD drive, the machine will just boot, and then turn off and repeat until I turn it off and unplug the extra load.

It's most likely your power supply isn't able to handle the pressure because a GTX460 takes a lot more power than a GT430.  I solved my hot GPU temperatures by putting some extra 120mm case fan right on the side of my computer where my GPU sits.

[iBlock]

That would make sense, but still, that doesn't explain why it still runs hot after putting the 430 back in.

[Bisjac]

you mean the basic case fans refused to run just because the new vid card was in?

i agree with the guys, only small power supply comes to mind.

That would make sense, but still, that doesn't explain why it still runs hot after putting the 430 back in.

well what are the watts that each of the cards use?

a fast fix best buy 800watt costs like 120 bucks.
or shop online if your picky

[Nickelob Ultra]

That would make sense, but still, that doesn't explain why it still runs hot after putting the 430 back in.

Then your airflow for the case isn't good.  A processor running at 2.8 GHz is hot, and so is a GTX460.

I pretty much have my case's side panel open with the 120mm blowing air towards the GPU, the panel fan towards RAM and a giant square front where the DVD drives would be.  I also ziptied all the cables for good measure.  I get maybe 35 C CPU and 36 C GPU on idle, up to 50 CPU and 55 GPU under load.

[iBlock]

This still wouldn't explain why the temperatures were perfectly fine before with the 430, and now they are not.

[Bisjac]

This still wouldn't explain why the temperatures were perfectly fine before with the 430, and now they are not.

well you have a newer model. a more powerful model.
does it use more power?

[iBlock]

well you have a newer model. a more powerful model.
does it use more power?

No. Three days ago, I had the exact same components being used as I am now. They were running fine. Now they are not. I took out the newer card and put the old one back in. There should be no difference with the exact same parts.

[Bisjac]

is it a prebuilt store comp that your upgrading? like maybe the case fans are involved with factory drivers lol.
new stuff could mess it

[iBlock]

is it a prebuilt store comp that your upgrading? like maybe the case fans are involved with factory drivers lol.
new stuff could mess it

No, it's not a prebuilt machine. I built it myself this January.

[Bisjac]

i would still upgrade the power supply. at least a electronics store one that would take returns.
try it out

[SeventhSandwich]

If you think about it, the thread title can be construed in two vastly different ways...

[Monocle]

Your PSU probably isn't powerful enough. Or if it's factory built, it could be a driver issue (yes, I'm serious)