Alienware Aurora R3 High DPC Latency

 So this problem seems to have been going on for a while now with my Alienware but I'm now just starting to look into it. The problem I'm having is that occasionally there are small audio pops/crackles with the computer and its apparently caused by DPC latency. So I downloaded a program called LatencyMon and it tells me the highest executors are dxgkrnl.sys and ndis.sys. First thing I did was update the nvidia driver but that didn't fix it. Next thing I did was update the realtek Ethernet driver but that didn't help either. I'm not sure what to do at this point because the computer is still having DPC latency issues. I'm running Windows 7 x64 home premium with an nvidia gts 450 (x2). Any ideas on this? Also the highest measured interrupt to process time is 12557.687879(µ) at the time I'm typing this.