HP Xw8400 HP xw8400 Service and Technical Reference Guide - Page 174

Caution

Page 174 highlights

CAUTION Be sure you can differentiate between which power cable connects to the PCI Express x16 graphics card and which power cable connects to the system board. These two cables look very similar. The PCI Express power cable has a black connector, and the system board power cable has a white connector. When power is present, you must never connect the PCI Express power cable to the system board. If you do so, the system board may be damaged and your warranty voided. To see a picture of the PCI Express cable and where it must be connected, refer to PCI or PCI Express installation on page 75. 6-Pin power (auxiliary system board) connector 46 13 Pin Color 1 BLD w/ORG stripe 2 BLK w/ORG stripe 3 BLD w/YEL stripe 4 BLK Signal +3.3V +3.3V +12V-A GND 5 BLK 6 BLD w/YEL stripe GND -12V 8-Pin power (for CPUs and memory) 5 8 1 4 Pin Color Signal 1 BLK GND 2 BLK GND 3 BLK GND 4 BLK GND 5 Gray +12 V CPU0 Rsense BLK w/WHT stripe +12 V CPU0 6 BLK w/WHT stripe +12VCPU0 7 BLK w/light blue +12VCPU1 stripe 8 BLK w/light blue +12VCPU1 stripe CAUTION Be sure you can differentiate between which power cable connects to the PCI Express x16 graphics card and which power cable connects to the system board. These two cables look very similar. The PCI Express power cable has a black connector, and the system board power cable has a white connector. When power is present, you must never connect the PCI Express power cable to the system board. If you do so, the system board may be damaged and your warranty voided. To see a picture of the PCI Express cable and where it must be connected, refer to PCI or PCI Express installation on page 75. NOTE The 6-pin power (auxiliary PCI Express) is only required with high-powered graphics cards. 164 Appendix D Appendix D - Connector pins ENWW

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CAUTION
Be sure you can differentiate between which power cable connects to the PCI
Express x16 graphics card and which power cable connects to the system board. These two
cables look very similar. The PCI Express power cable has a black connector, and the system
board power cable has a white connector. When power is present, you must
never
connect the
PCI Express power cable to the system board. If you do so, the system board may be damaged
and your warranty voided. To see a picture of the PCI Express cable and where it must be
connected, refer to
PCI or PCI Express installation
on page
75
.
6-Pin power (auxiliary system board) connector
Pin
Color
Signal
4
6
3
1
1
BLD w/ORG stripe
+3.3V
2
BLK w/ORG stripe
+3.3V
3
BLD w/YEL stripe
+12V-A
4
BLK
GND
5
BLK
GND
6
BLD w/YEL stripe
-12V
8-Pin power (for CPUs and memory)
Pin
Color
Signal
5
8
4
1
1
BLK
GND
2
BLK
GND
3
BLK
GND
4
BLK
GND
5
Gray
BLK w/WHT stripe
+12 V CPU0 Rsense
+12 V CPU0
6
BLK w/WHT stripe
+12VCPU0
7
BLK w/light blue
stripe
+12VCPU1
8
BLK w/light blue
stripe
+12VCPU1
CAUTION
Be sure you can differentiate between which power cable connects to the PCI
Express x16 graphics card and which power cable connects to the system board. These two
cables look very similar. The PCI Express power cable has a black connector, and the system
board power cable has a white connector. When power is present, you must
never
connect the
PCI Express power cable to the system board. If you do so, the system board may be damaged
and your warranty voided. To see a picture of the PCI Express cable and where it must be
connected, refer to
PCI or PCI Express installation
on page
75
.
NOTE
The 6-pin power (auxiliary PCI Express) is only required with high-powered graphics
cards.
164
Appendix D
Appendix D — Connector pins
ENWW