I recently got the Witcher 3, and my GTX 670 is showing its age, so I wanted to get a little more oomph out of it by overclocking. Funny thing is, no matter what I set in the MSI panel, GPU clock speed doesn't change at all. Temps are under 70C, I've bumped up power limits to 114% and increased voltage by 40 mV. But I still can't get above 1215 MHz (it's factory overclocked), even with the GPU Core Clock set to +100Mhz Could this be because I recently upgraded to Windows 10, or am I missing something? I confirmed that the clock speed is not changing with GPU-Z as well.