Diablotek EL Series PSEL400 400W ATX Power Supply. Now that you've finally decided which CPU, motherboard and video card you want to put into your new computer, what are you going to do about the power supply? Revive your computer system with this Diablo 400-Watt power supply! It fits into a standard ATX case and will handle as many add-ons as your case can take! Diablo is a direct manufacturer of power source solutions, producing high quality power supplies. Diablo power supplies feature High efficiency, Low Noise and Ripple Output, Over Voltage protection and Short-circuit protection at any DC output.