Patent ID: 7173821

Claim:
A rack mounted computer apparatus comprising: a rack; a plurality of AC to DC power converter modules mounted on the upper portion of said rack; a power supply line, wherein said plurality of AC to DC power converter modules are electrically connected to the power supply line in a parallel manner to supply a DC current through said power supply line; one or more direct current voltage step-down converters; a plurality of computers mounted below said plurality of AC to DC power converter modules, each of said plurality of computers is electrically connected to said power supply line to receive the DC current from said power supply line, wherein each of said plurality of computer comprises a CPU, a ROM, a RAM and a hard drive, and wherein each of said plurality of computers is further configured to receive DC current from the power supply line through the direct current voltage step-down converter located outside of each of the plurality of computers; and wherein said power supply comprises two or more direct current modules configured to provide fail over protection.