Weird problem with my computer

RaZKaLz

Honorable
Nov 25, 2013
21
0
10,520
So, for a couple of days now my computer is acting weird. When I'm playing games the screen freeze and both of my screens are full of squares of different colors. I looked it up and some says it might be a virus/malware but I cleaned my computer and it still does it.

I thought it might be the GPU temperature that cause this but my temp is fine when I play and when I do normal stuff on my computer. I used HWinFo to check my GPU temp and that's when I noticed that 2 of the temp on my motherboard spike to over 100 Celsius. It goes from 0 to over 80-100 on and off and it says Temp 5 and Temp 2. Is there a way to see what part of my motherboard that is?
And for the graphic card should I just buy another one and test it out?

I use an NVidia GTX 780, my motherboard is an ASUS Sabertooth Z87, Intel I7 4770K.
My computer is 3-4 years old. Any help would be appreciated, thank you.