atomicWAR :
Maybe but more likely its because of the overclocks effecting your audio directly on the board (usually an induced current somewhere affecting your DSP's circuit). It has happened to me and most times easing up the OC or adding a PCIe sound card are your only options though some times a bios/driver update helps if your lucky. I would try updating those first then if that doesn't work make the hard decision on decreasing your OC or getting an sound card so you can isolate it from the electrical noise on the motherboard from your DSP.
thank you for your reply ,I'll look at getting a sound card because I insist on keeping that 4ghz overclock, And also is the induced current an inherently bad thing?