Coil whine and GPU acting up

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skyline4727

skyline4727

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Jan 21, 2013
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I have an EVGA 780SC with a 4670K on an Asus Z87-A motherboard. It's powered by a Thermaltake smart series 850W semi modular PSU. When I run benchmarks I can hear a pretty distinct coil whine and I'm assuming it's from the GPU because I only hear it when I run a benchmark or play a demanding game. I ran prime 95 at 4.5Ghz and 1.22 volts and I didn't hear anything so I don't think it's the PSU. I also noticed though that when I had the CPU OCed to 4.5 at 1.22 volts, the GPU would give me an error which I read can mean it's not getting enough power. I backed the CPU to 4.0 Ghz and auto voltage and now the GPU works so I don't know if the PSU isn't providing enough power.
 
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youssef 2010
I think it's probably a problem with your motherboard. If you have a second PCIe slot, try moving the card to that slot and see what happens. The coil whine might even be coming from the motherboard. The only way to verify the source of the coil whine is to test the card in another computer
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Brantyn Gerik

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Sep 18, 2013
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Your psu SHOULD be giving you enough power, unless it is somehow defective (very uncommon but still possible)

Coil whine with evga cards is surprisingly common, but is something you can ask for a replacement for

the FINAL source of problem in the mix can in fact be your motherboard. especially if it is giving you problems after overclocking (good luck getting a 4670k stable at 4.5 with under 1.3 volts) haswell doesnt overclock as well as the last 2 generations.

If you CAN, try a different motherboard and try gpu stress tests while bringing down the overclock on the card (msi afterburner and just dial down the clocks by about 10%) the factory overclock might be slightly too high and in turn is causing the coil whine
 
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skyline4727

skyline4727

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I got lucky and I got one of the good chips so it's actually stable at 4.5 with 1.22. I stress tested with Prime95 and it was good. I was considering the PSU because the GPU wouldn't run when the voltage was at 1.22 for the CPU. I even ran the 780 with no overclock and it wouldn't run while the CPU was 1.22. I put the CPU on auto voltage and now they both run but I had to lower the CPU clock.
 
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youssef 2010

youssef 2010

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I think it's probably a problem with your motherboard. If you have a second PCIe slot, try moving the card to that slot and see what happens. The coil whine might even be coming from the motherboard. The only way to verify the source of the coil whine is to test the card in another computer
 
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