For the longest time i have been battling a horrible slownes in my win 7 64 bit system. Asus p6t MB i7 -930 2.81 gig overclocked to 3.85 gigs 6 gigs ddr Pny Nvidia gtx 470 over clocked as well. All my games played horribly.. low frame rates etc etc. well when over clocking my grafics card in a attempt to get more frames per second i ran cpu-z and bang there it was 1 core 1 thread being utilized checked task manager/performance monitor and same only one cpu clock showing. brought up msconfig and went to boot advanced and only 1 thread showing no option to select anything else. updated mb drivers updated all other drivers same problem so I simply uninstalled all 8 cpus from the device manager and ebooted and let windows redownload the drivers.. then on reboot i opend msconfig and sure enough all 8 were available i then clicked the box to use all 8 and now wow my rig is a screamer batttlefield bad company on 1920x1280 is consistantly 70 to 75 frames per second with every detail seting to max. i suggest anyone having slow system and poor game performance do a check to make sure you are using all your cores. just download and run cpu-z abd see how many cores and threads it lists if its not 4 and 8 then you need to do the above. In my searching across the net no one even recomended this simple fix all were saying a reinstall would be needed etc. it worked perfect for me and should for anyone else with the same issue.