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Appendix B Hardware Configuration
4-pin 12 V Power Connector
JPWR1 is a 4-pin 12 V power connector that provides alternative power.
Extended CMOS Battery Connector
J18 is a secondary power connector that provides power to the CMOS battery.
4-pin HDD Power Connector
J15 is a 4-pin power connector that provides power to onboard HDD devices. Refer to the
following table for pin definitions.
Headers and Connectors
Fan Headers
There are six fan headers on the motherboard. These are 4-pin fan headers; pins 1-3 are
backward compatible with traditional 3-pin fans. The onboard fan speeds are controlled by
Thermal Management via IPMI. When using Thermal Management setting, please use all
3-pin fans or all 4-pin fans.
Table B-6. 4-Pin Power Pin Definitions
Pin Definition
1-2 Ground
3-4 +12 V
Table B-7. CMOS Battery Connector Pin Definitions
Pin Definition
1 VBAT
2 Ground
Required Connection
Table B-8. 4-Pin HDD Power Pin Definitions
Pin Definition
1 12 V
2 GND
3 GND
4 5 V
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