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Figure 4. System board part locations
1 4-pin power connector
11 Clear Complementary Metal Oxide Semiconductor
(CMOS) /Recovery jumper
2 Microprocessor
12 Cover presence switch connector (also called intrusion
switch connector)
3 Microprocessor fan connector
13 Internal speaker connector
4 Memory slots (4)
14 Front audio connector
5 Serial (COM 2) connector 15 PCI card slots (2)
6 24-pin power connector
16 PCI Express x1 card slot
7 Power fan connector
17 Battery
8 SATA connectors (4) 18 PCI Express x16 graphics card slot
9 Front panel connector
19 System fan connector
10 Front USB connectors (2)
Locating internal drives
Internal drives are devices that your computer uses to read and store data. You can add drives to your
computer to increase storage capacity and enable your computer to read other types of media. Internal
drives are installed in bays. In this manual, the bays are referred to as bay 1, bay 2, and so on.
When installing or replacing an internal drive, it is important to note the type and size of the drive that you
can install or replace in each bay and correctly connect the cables to the drive installed. Refer to the
appropriate section in Chapter 2 “Installing or replacing hardware” on page 13
for instructions on how to
install or replace internal drives for your computer.
10 ThinkCentre User Guide