Genuine OEM Original HP 5188-2625 Bestec ATX-300-12Z Rev:CDR 300W Power Supply Brand: Bestec Model: ATX-300-12Z Rev:CDR Max Power Output: 300W Bestec models ATX-300-12Z CDR, ATX-300-12Z BC, and ATX-300-12Z CC HP part numbers 5188-2625, 5188-0131 and 5187-5116.