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9 System board battery
Your server has a special type of memory that maintains the date, time, and conguration information for
built-in features. The system board battery keeps the information active when you turn off the server.
10 Platform Controller Hub (PCH)
This chip on the system board serves as a PCH, which provides the data buffering and interface arbitration
required to ensure that system interfaces operate efciently and provides the bandwidth necessary for
the system to achieve peak performance. The chip supports and provides many features, including the
onboard SAS software RAID.
11 Internal USB Type A connector 1
13 Internal USB Type A connector 2
Used to connect a device that uses a USB Type A connector. For example, in some situations, you might
want to connect a USB key directly to the system board. In this case, you can connect it to an internal
USB Type A connector.
12 TMM Premium connector
Used to connect a server option named ThinkServer Management Module Premium (TMM Premium) to
enable advanced remote management functions on your server. See “Installing or removing the ThinkServer
Management Module Premium” on page 100.
14 TPM connector
Used to connect a ThinkServer Trusted Platform Module (TPM), which is a security chip, to enhance server
security. See “Installing or removing the ThinkServer Trusted Platform Module” on page 103.
15 iButton socket
Your server supports ThinkServer RAID 300, which includes onboard SAS software RAID levels 0, 1, and 10.
You also can activate onboard SAS software RAID 5 by installing a ThinkServer RAID 300 Upgrade Key for
Advanced RAID in the iButton socket. For more information, see “Installing or removing the ThinkServer
RAID 300 Upgrade Key for Advanced RAID” on page 96.
16 ThinkServer Management Module
With the integrated ThinkServer Management Module (hereinafter referred to as the TMM), no matter what
condition the server operating system is in and no matter if the server is on or off, as long as the server
is connected to network and an ac power source, the interaction with the TMM controlled servers can be
achieved through system network. The user can obtain the server hardware health information and SEL,
and is able to conduct the operations including turning on or off the server, restarting the server, locking
the power switch on the front panel, and so on. This part of the server management is independent of the
operating system and is called out-of-band management.
17 Riser card assembly 1 slot
Used to install the riser card assembly 1.
18 Riser card assembly 2 slot
Used to install the riser card assembly 2.
Chapter 3. Product overview 33