Dell Power Supply Model Number H275P-00 Part Number HP-L275GF3P, DPS-275CB-1 A, TD570 for Optiplex 740, 745, 755, GX520, GX620

Dimensions: 8 1/4 W x 2.5 H x 3 D - Inches

Connectors:
1 x 24 Pin
1 x SATA
1 x 4 pin