Well i hooked up the other 250 PS and have it running all hard disks, cd-roms and floppy drives, that way all the orignal one that is hooked to the MOBO will have to power is the board, board, ram, mice and other misc, I think that pushing the hard disks and cd-roms and floppy to the other powersupply should free up enough power to push the v5 without problems.