manic

What are your temps like? If you go into bios under hardware
monitor it will give you idle temps,it will also give you voltages,
take a look at both temps and voltages and post back, granted they
are idle temps, and voltages but may give us a idea. You can install
speedfan, or motherboard monitor and it will monitor temps while
system is under load, I lke speedfan for that. Might be heat, or
it could just be something flakey with the board. The power supply
you have not is probably ok, dont buy a bfg, buy a corsair or seasonic,
do some reading about power supplies in the hardware section of this
forum. Stay away from antec, they used to be real good, but have
switched suppliers, and the quality has faded.