Dell OptiPlex GXi Service Manual (.pdf) - Page 37
DC Power Distribution for the Mini Tower Computers, riser board
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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 PCI5 +5 VDC -5 VDC +12 VDC -12 VDC ISA1 through ISA4 internal P2 hard-disk drive internal P3 hard-disk drive P4 3.5-inch diskette drive P5 optional drive P6 optional drive P9 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 Figure 1-18. DC Power Distribution for the Mini Tower Computers System Overview 1-19