PSU Makes noise but not in safe mode

TWOSIXFIVE · Mar 13, 2014

basically if i boot into windows (win 7) my psu will make a slight coil whine noise when moving mouse around and also when loading chrome...but i run my pc in safe mode there is no noise...im %99.9 sure the sound is coming from the psu...this problem started to happen only after a motherboard and cpu upgrade....could this be driver or software related? thanks
ALSO.. the exact sound that is coming from my psu i can hear through my wireless turtle beach xp500's

specs:
MOBO-asus m5a99x evo r2
CPU-amd fx-9370 8 core black edition
GPU-gigabyte radeon r9 270x 4G
PSU-ay wun pro 850 megapower

ko888 · Mar 13, 2014

Safe mode uses Microsoft's own default device drivers for devices like the graphics card. This definitely places a different power load on the power supply unit.

AMD's own graphics card driver would result in a different graphics card operating mode and different power load being placed onto the power supply unit.

TWOSIXFIVE · Mar 13, 2014

so my problem would be with the GPU drivers? or the power supplied to the GPU? ....sorry i'm relatively new to pc gaming/pc building

ko888 · Mar 13, 2014

There are just some combinations of graphics card models and power supply models that have worse coil whine.

Sometimes just changing the power supply gets rid of the problem.

Sometimes the coil whine comes from the graphics card's VRM circuit and some graphics card manufacturers will even tell you to just live with it.

TWOSIXFIVE · Mar 13, 2014

but the thing is that i have run this psu and gpu together for around a month, only when i upgraded my mobo and CPU today this problem started...

ko888 · Mar 13, 2014

And the load on the power supply has also increased.

Your power supply is now operating in a range where it is susceptible to produce coil whine.

TWOSIXFIVE · Mar 13, 2014

so what are my options at this point? is there anything i can do to try and stop it or lessen it... thanks for the reply's too

ko888 · Mar 13, 2014

If you've definitely isolated the coil whine to the PSU and if the PSU is still within its warranty period then initiate an RMA with AYWUN Support.

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PSU Makes noise but not in safe mode

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