Awful PSU Noise and Audio Interference

Hello,

Recently I tried "upgrading" my systems cooling performance by re-routing all of my existing cables and adding two brand new Corsair case fans.

After hooking everything up, rebooting and messing around on the internet for a few hours, I noticed a very high pitched whine coming from my case. The next time I plugged in a pair of headphones to the front audio port, I noticed that the high pitched whine was being reproduced in my headphones (let alone the fact that my noise dampening headphones do very little to block the high pitched whine coming from the case itself).

Additionally, I noticed that in BF3, which stresses my processor quite a bit, I was getting stutter that was not associated with my graphics card (ie, no frame rate drops whatsoever, just stuttering that looks like lag). I know that my internet connection is rock-solid.

The sound seems to be coming from my PSU. Did I knock something loose to create this high pitched whine? Is it causing my PSU to send intermittent power to my CPU?

My build (which is two years old):
CPU: i5-760
Mobo: Gigabyte GA-P55
GPU: 550-ti
PSU: Antec Earthwatts 380W
Memory: G-Skill Ripjaw 4Gb @ 1600 (x2)
Case: Corsair 300R

Here are my voltages as reported by SpeedFan: (I'm not super knowledgable about the voltages but these look out of the norm)
Vcore1: 0.93V
Vcore2: 1.58V
+3.3: 3.34V
+5: 4.95V
+12: 4.67V
-12: -.75V
-5: -8.68V
+5: 3.60V
Vbat: 3.3V

Thanks for the help!