For nearly two years I was overclocking my 660m via Nvidia Inspector without any issues. I simply used a desktop shortcut with these paramters: -forcepstate:0,0 -setGpuClock:0,2,1165 -setMemoryClock:0,2,2600 Everything worked fine the whole time. I'd always see the core clock change to 1165 mhz but today after I updated to 390.00 drivers the only thing that would go up is the memory clock to 2600, p-state as the core clock would not change. I immediately went back to the previous version 358.91 using clean install but the problem remained. What could've happened? Bios version is unmodified 80.07.27.00.05 and I'm running on Win7 Home.