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Chapter 4: Motherboard Connections
4.2 Headers and Connectors
The data cables in the system have been carefully routed to maintain airflow efficiency. If you
disconnect any of these cables, take care to re-route them as they were originally.
Important!
Make sure the the cables do not come into contact with the fans.
Fan Headers
There are eight 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 through the BIOS > Hardware Monitoring.
Note:
When using Thermal
Management setting, use all 3-pin fans or all 4-pin fans.
Fan Header
Pin Definitions
Pin#
Definition
1
Ground (Black)
2
+12V (Red)
3
Tachometer
4
PWM Control
SGPIO Header
The SGPIO1 (Serial General Purpose Input/Output) header is used to communicate with the
enclosure management chip on the backplane.
JSGPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
Ground
2
DATA IN
3
Ground
4
DATA Out
5
Load
6
Ground
7
Clock
8
NC
NC = No Connection
Chassis Intrusion
A chassis intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
Chassis Intrusion
Pin Definitions
Pins
Definition
1
Intrusion Input
2
Ground