Dell OptiPlex GXi Service Manual (.pdf) - Page 36
DC Power Distribution for the Midsize Computers
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keyboard controller system board +3 VDC P1 PWRGOOD system power supply PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC power management logic POWER1 PSON# +5 VFP +5 VDC -5 VDC +12 VDC -12 VDC RTC/ NVRAM battery RISER +5 VDC -5 VDC +12 VDC -12 VDC P7 +3.3 VDC POWER2 riser board +3.3 VDC +5 VDC +12 VDC -12 VDC PCI1 through PCI31 +5 VDC -5 VDC +12 VDC -12 VDC ISA1 through ISA31 internal P2 hard-disk drive internal P3 hard-disk drive P4 3.5-inch diskette drive P52 optional drive P62 optional drive +12 VDC FAN main memory sockets DIMM_A DIMM_B fuse DIMM_C +5 VFP +5 VDC +5 VDC +5 VDC DIMM_D +5 VDC MICROPROCESSOR processor core regulator +3.3 VDC core VCC +2.1 to +3.5 VDC PANEL USB KYBD MOUSE 1 A second riser board option provides two additional PCI connectors (PCI4 and PCI5) and only two ISA connectors (ISA1 and ISA2). 2 Some computers have an additional connector (P9) that may be used instead of P5 or P6. Figure 1-17. DC Power Distribution for the Midsize Computers 1-18 Dell OptiPlex GXi Systems Service Manual