Figure 1-17. Dc Power Distribution For The Midsize Computers - Dell OptiPlex GXi Service Manual

system
power supply
internal
hard-disk drive
internal
hard-disk drive
3.5-inch
diskette drive
optional
optional
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.
Dell OptiPlex GXi Systems Service Manual
1-18
keyboard
controller
P1 POWER1
PWRGOOD
PSON# PSON#
+5 VFP +5 VFP
+5 VDC +5 VDC
–5 VDC –5 VDC
+12 VDC +12 VDC
–12 VDC –12 VDC
P7 POWER2
+3.3 VDC
main memory
P2
DIMM_A
P3
DIMM_B
DIMM_C
P4
DIMM_D
2
P5
MICROPROCESSOR
drive
2
P6
drive

Figure 1-17. DC Power Distribution for the Midsize Computers

system board
+3 VDC
power
RTC/
management
NVRAM
logic
sockets
fuse
processor
core regulator
+3.3 VDC
core VCC +2.1 to +3.5 VDC
riser board
battery
+3.3 VDC
+5 VDC
+12 VDC
–12 VDC
RISER
+5 VDC
+5 VDC
–5 VDC
–5 VDC
+12 VDC +12 VDC
–12 VDC
–12 VDC
+12 VDC
FAN
+5 VFP
PANEL
+5 VDC
+5 VDC
USB
+5 VDC
KYBD
+5 VDC
MOUSE
PCI1
through
1
PCI3
ISA1
through
1
ISA3