I've been having problems with my 4th core (core 3) usually up around 80% usage while all the other cores are idled around ~5% under normal circumstances without running any intensive programs. In the resource monitor, I noticed the culprit was the System Interrupts which was well above the rest of the processes at ~25% average cpu, occasionally exceeding that approaching 60% right now. I ran the tests that you described and am unable to come to a solution myself. Would you be able to look at the .etl file for me and suggest any possible solutions? Picture of the graph: http://img696.imageshack.us/img696/4264/graphsm.png DCP_Interrupt.etl: http://www.megaupload.com/?d=3N2RKS5C MSI K9N2 SLI Platinum Motherboard AMD Phenom II 940 Corsair XM2 4 GB (2x2 GB) NVIDIA Geforce 9800 GTX+ 250 GB WD Caviar Blue IDE HD (WD2500LB) 80 GB WD Caviar Blue IDE HD (WD800LB)
