I think my power supply is broken. I constantly hear this humming coming out of my pc. I already checked and saw that the fan of my video card is rotating allot slower than it normally should do. I also see that my video card has a temperature of 75°C (=167°F) which is far above normal.

Isn't there any app to check how many watts my pc is using because I think there is a problem with my power supply which causes a power loss.