Check the wattage on your PSU and GPU. The PSU might not be putting out enough watts.
my psu has 300 watts and 28 amps
it meets the minimum recomended psu wattage
welp it looks like i will be stuck with my stuffty integrated gpu
specs:

i've taken this picture before i upgraded my gpu
edit 2: my monitor did this stuff before with my 8600 gt