I just tried to install without molex power and nothing...so i went down to frys this morning and bought a sata to molex, then a molex extension. Bad thing was i had the dissasemble the molex head on the sata to molex adapter and thread the 4 wires through the little crevice in the bottom left of the cd housing. I used 2 eyelash tweezers; one to push through and one to pull, after that put the molex head back on plugged in the extension and bada bing all done.