Xonar DX bad audio.

[moab]

I just swapped my hard drive out. And can't get my xonar dx to work properly in internet radio or movies played in VLC. It cuts out, drags, is just basically terrible audio with several minutes that are fine. And then the audio just goes to ****. I've tried both the ASUS drivers and the UNI drivers (both latest and the stable version). My Xonar DX Audio Center settings are 6 ch, 44.1khz, 5,1 speakers (But I've played around with various configurations and nothing works). And I set windows to 24 bit 44100hz. I've tried everything. And the audio is just terrible. It was working fine with the old ASUS drivers before I swapped hard drives. I'm also running Logitech 5.1 speakers. How do I fix this?