been running for about 40mins now and temps stayed around the 47/48c mark.
OK, the case is the problem.
When gaming, the GPU gets hot and makes temps rise in the case, and the CPU gets hotter as well and it has only one fan to get rid off the heat. Not enough.
The rear fan gets rid off the temp from the CPU area, but u don't have one, so the hot air gets stuck up there.
If u would get even one fan, it would be enough, I think.
But tell me, who made it without the rear case fan? Genius.
Don't take advice from that one : )