HP Dc7900 Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 83
Energy Star Compliancy, an option for the SFF and CMT form factors.
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Power and Signal Distribution Figure 7-4 shows the power supply cabling for CMT systems. Power Supply Unit P9 P10 P11 P6 P8 P4 P5 P3 P1 P4, P5, P9, P10, P11 5 4321 P8 432 1 P6 12 34 P1 13 P3 24 13 24 1 12 Conn P1 P1 [1] P3 P4, 5, 9, 10, 11 P6 P8 Pin 1 +3.3 +3.3 RTN +3.3 +12 +5 Pin 2 +3.3 -12 RTN RTN Pin 3 RTN RTN VccP +5.08 Pin 4 +5 PS On VccP RTN Pin 5 RTN RTN +12 Pin 6 +5 RTN Pin 7 RTN RTN RTN RTN +5 RTN RTN +12 Pin 8 POK PSDet Pin 9 5 aux +5 Pin 10 +12 +5 Pin 11 +12 +5 Pin 12 +3.3 RTN NOTES: Connectors not shown to scale. All + and - values are VDC. RTN = Return (signal ground) GND = Power ground RS = Remote sense POK = Power ok (power good) [1] This row represents pins 13-24 of connector P1. Figure 7-4. CMT Power Cable Diagram 7.2.3 Energy Star Compliancy The standard USDT power supply unit is 87 percent efficient and compliant with the Energy Star 4.0 specification. The standard power supply unit for SFF and CMT systems is Energy Star 3.0-compliant. An Energy Star 4.0 (80Plus Bronze-compliant) power supply unit is available as an option for the SFF and CMT form factors. Technical Reference Guide www.hp.com 7-5