Without or with Overclocking .. take this notice Don't use MSI mode for nvidia card on Desktop computers because it effect the clock time, it mess up something in the driver. I've never had any issue with any of the drivers till I enabled MSI mode the last time which caused the GPU Clock when I left it Idle for a long time to be stuck on 670 mhz and max was 789 mhz, changing the memory or gpu clock using Nvidia Inspector brought the Clock back to full after closing Nvidia Inspector but game felt laggy till I did a restart. So using DDU just to be sure and not using MSI even when overclocking more now the issue doesn't happen anymore. For some weird reason MSI is enabled for both ATI and Nvidia cards on Laptops. but ATI has MSI enabled on desktop too, can't be sure why. I wish someone could ask nvidia why.