which gpu you using? you can use nvidia inspector to overclock nvidia gpu core clock or shader clock, then right click "Overclocking" and choose option like Apply... Warrning: DO NOT TOUCH OVERCLOCK RAM function (GPU MEMORY) it will fry your gpu. and nvidia is easy corrupt if overclock gpu ram or benchmark long time make it hot above 85°C on win 10. On windows 10 it is actually something that can easily fry the nvidia gpu so be careful. On windows 7 no matter how I overclock, just turn off the computer or go into safe mode and delete the gpu overclocking settings and it will work again, but when overclocking fails or simply benchmarking on win 10, the gpu is at risk. The chance of permanent physical damage is very high. You can switch to win 7 to temporarily use nvidia if gpu fried after overclock on win 10 when your gpu is permanently unusable on win 10, it's like when you reinstall the entire win 10 and install the nvidia driver every time it will crash the entire pc.