strange startup problem

my PC - evga 780i sli mobo, sli 9800gtx's 2x WD caviar SE16 HD's in raid 0 , vista home premium 64 bit

ok so im having a strange problem that jst happened today when i started my computer and have no clue how it arose.

when i startup usually the black screen with the memory test and it lists my parts ... press f_ for bios.. bla bla then my nvidia raid 0 check goes through.. and then my computer starts up

today my moniter not only didnt show those startup tests but pretty much a rainbow of colors started to run across my screen, starting small and then filling it.. but then my computer will start and work properly

i tried reinstalling nvidia's newest display drivers, no dice, but i have tried playing games and theirs no artifacs, no framerate drop, my computers fine, its just this bios thing

i also tried checkdisk and it didnt show either. is it like the onboard video is shot?

any idea's how to fix this?

thx