Hello I've just installed a 770 GTX, and when I was trying on some games, the computer would restart ( strangely enough it restarted during Assassin's Creed 4 and not during Battlefield4, and they were both maxxed out) I have a 700W PSU with 40 Amps on the 12V rail, it's a cheap one, not a good brand. When the computer started up again I checked the GPU temperature and it was around 40 Celsius, only the motherboard had a higher temperature, that was around 60 Celsius. I don't know what to do, is it possibile that my PSU sucks that bad that even 700 W can't handle it ? Or it could be something else ? Thanks in advance.