audio lag

[artistream]

hey all,
I have a custom build that I put together a couple months ago and whenever I am playing songs or watching a movie there is a little lag or skipping every couple minutes. im not sure where to start looking, but I know my pc can handle it. any suggestions on where to start looking?

q6600
evga 760i mobo
4gb g skill ram
evga 8800gts card

 

[fantomau]

My old p4 system did that with onboard audio.