Coil Whine after installing fans

[Fragman]

Hey guys, about three months ago I noticed some pretty bad coil whine coming from my computer after installing two fans. I used a fan y splitter to install two fans on one header. Since then I've removed the y splitter and just used one fan, but the coil whine is still there. Any help would be appreciated. Thanks.

 

[HiTechObsessed]

What are all the specs in your system, including model/wattage of your PSU? And how long have you had everything?

 

[Fragman]

What are all the specs in your system, including model/wattage of your PSU? And how long have you had everything?

My computer is pretty new, I've only had it for about 4 months. My specs are:

Processor: Intel I5 4670k OC to 4.2Ghz
Motherboard: Asus Z87-C
GPU: GTX 770
PSU: 660W Corsair CX

 

[Fragman]

Anyone?