Next time that drive fails you could connect it to the other SATA controller on your motherboard and run seatools on it. I run 7 total disks off a 525 watt enermax PS and I have no problem at all with my i7-860. Just check to see if that drive passes the long test. I had a problem with drives dropping when I first built my computer, but I found that it was from the random reboots caused by my RAM voltage being too low. Just some ideas. Good luck.