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1 PMBus connector
The BMC can read the power supply status registered through PMBus. You do not need to connect
any device to the PMBus connector. This connector is kept for power management in models with
redundant power supply modules. The function of the PMBus connector is not available for models with a
screw-secured non-hot-swap power supply.
2 TPM connector
Used to connect a TPM module, which is a security chip, to protect your server and strengthen server
security. See “Installing or removing the TPM module” on page 109.
3 – 6 Memory slots
Your server system board provides four memory slots to support up to four memory modules. For more
information, see “Memory module installation rules” on page 90
.
7 iButton socket
Your server supports onboard SATA software RAID levels 0, 1, and 10. However, you can activate onboard
SATA software RAID 5 by installing a ThinkServer SATA Software RAID 5 activation key in the iButton socket.
For more information, see “Installing or removing the ThinkServer SATA Software RAID 5 Key” on page 102.
8 Main power connector
Used to connect the 24-pin P1 power connector of the power supply to provide main power to your server.
9 5-pin system fan 2 connector
Used to connect the cable of the upper front system fan (front system fan 2) if your server model has
two front system fans.
10 Microprocessor
A microprocessor incorporates most or all of the functions of a computer's central processing unit (CPU) on
a single integrated circuit. The microprocessor for your server is secured in the microprocessor socket on
the system board and a heat sink and fan assembly is installed above the microprocessor to provide cooling.
For more information about your microprocessor type, see “Features” on page 7
.
11 Intel C202 chip
The Intel C202 chip on the system board serves as a platform controller hub (PCH), which provides the data
buffering and interface arbitration required to ensure that system interfaces operate efciently and provides
the bandwidth necessary to enable the system to obtain peak performance. The chip supports and provides
many features, including the onboard SATA software RAID.
12 4-pin system fan 1 connector
Used to connect the cable of the lower front system fan (front system fan 1).
13 – 18 SATA connectors
Used to connect SATA signal cables for the SATA hard disk drives or SATA optical drives.
44 ThinkServer User Guide