try doing a clean install on your drivers, those temps aren't an issue
1) uninstall anything to do with AMD and Nvidia (if you had an old nvidia gpu)
2) power down your pc
3) boot your pc
4) run the latest installer for your graphics card
reboot your pc, and see if that helps. if it doesn't it could be any number of problems from a lame card to a psu that's just not really up to delivering the power that card needs. you can also look into updating your bios on your motherboard. sometimes that helps.