I have a asus 939 motherboard and a 750 watt power supply with a gt 9500 graphics card..my question is when I plug up aux .power to card it causes all my games to crash..when I ulplug aux, power I can plug some games butI cant play games like Bioshock and call of duty Waw...this has been going on for a while with no luck getting it fixed..any help would be great