i misunderstood what you said. i thouht you were plugging it in an regular AC outlet on the power supply. most of the hardware you want to upgrage with sound like they will work but the new hard drive you want to buy supports ATA100 but your motherboard only supports UDMA 33/66 so the hard disk will be slowed down. you said you recently purchased this motherboard but it sounds like a old used motherboard from a few years ago. so given that i would just buy cheapest atx power supply i could find for it.