4-14 www.hp.com Technical Reference Guide
System Support
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Units using chassis and CPU fans must have both fans connected to their corresponding headers
to ensure proper cooling of the system.
4.6 Register Map and Miscellaneous Functions
This section contains the system I/O map and information on general-purpose functions of the
ICH9 and I/O controller.
4.6.1 System I/O Map
Table 4-9 lists the fixed addresses of the input/output (I/O) ports.