hey, i also have the same problem, the furest i can pinpoint the noise is on the pcb, above the middle of the led sign, around the TR letters, i have checked my 8 pin power leans and they seem fine, system is deftinately stable as i have been running furmark foor 30 mins +
my specs are as follws
PSU :- HX750 Corsair
mobo :- asus p7p55d-e
matrix currently @ 976MHz for 1144mV
more info can be provided if required
hope that helps
boogman
i7 4770k @ 3900MHz 1.0v
R.O.G Maximus VI Extreme
GTX 580 Matrix Platinum 980 MHz @1150mV GDDR @ 50015 effective @ mV
20GB Corsiar Vengeance 2x8GB PRO + 1x4GB
2X 120GB Corsair GT SDD - RAID 0
CoolerMaster CM Storm Trooper
S.T.R.I.K.E 7 Keyboard
R.A.T. 9 Mouse
i5 760 @4139MHz 1.40v
12GB coarair vengance 2012MHz 9-9-9-20 @ 1.65V
Coolermaster 430 Eliete Black