I tried running Team Fortress 2 in a windows with Everest showing temperatures. CPU+cores keep around 65C and my videocard around 60C. They're the only things that increase in temperature (CPU is around 45C when idle and videocard 50C). I'm really wondering if I should bring it to a repair shop, but what are they going to do? Play games untill the error shows? Edit: I also did the Power Supply Calculator. I'm not sure about my CPU though, since there are 2 models, a G0 and B3. With the G0 I get 463 Watt and with the B3 I get 494 Watt. So my 420 Watt PSU doesn't seem to be sufficient (which is surprising, because I had it build by a shop and I'm guessing they would know what kind of PSU it needs). I don't have a lot of experience with this, so my question, is it possible that I would actually need 494/463 Watt? Wouldn't I have noticed it before then? And is it possible this is the cause of my problem?