I have built a new PC. 750W power supply, 16G ram, I7 6700 pcu, MSI gaming board, 1070 gpu. I use flynside to run x plane 11 in VR with Oculus. I can fly for about an hour then the PC will usually just shut off and then restart on its own. Sometimes I have had the screen just go black but sound is still there. Anyone have any ideas??