Hi guys im having a problem im using an asus m5a78l-m lx3 plus with an fx4100 and 8gb ddr3 and when i use the gpu on the motherboard works well but when i put a gtx 750 the system gets stuck at the splash screen and i cant do anything. ive tried an rx 580 in this system and works fine and the gtx 750 in another system and it also works fine. What it can be?