You're spending 5800$ on a computer, and not even using your own disposable income on it. If I just heard some kid got 5800$ from his parents for a gaming rig my first reaction would be "He's probably a spoiled brat".
The sound is coming from the lower part of the case and the rear case fan isn't spinning. It isn't a mechanical sound, more of a plastic sound, will try unscrewing the extraneous screw on the HDD tomorrow.
I'm going to need a source on this. If it was due to Wi-Fi a cordless phone or microwave would have the same effect since they are all 2.4 GHz radio waves.
A webstore had a promotion where you got a 5 pack of "pingvinstänger" included, a type of candy they are known for including with orders, so a 1$ iPhone 4 case.