Dell OptiPlex GX300 - Manual (Page 37)

System Board Components
Figure 3 shows the system board and the location of all its sockets and connectors.
Figure 3. System Board Components
1 CD-ROM drive audio interface connector
2 Serial port 1 connector
3 Parallel port connector
4 Serial port 2 connector
5 Fan connector
6 Voltage regulator module (VRM) connector
7 Microphone connector
8 Line-out connector
9 Line-in connector
10 Keyboard and mouse connectors
11 Universal Serial Bus (USB) connectors
12 Secondary processor connector
13 Telephony connector
14 Network interface controller (NIC) connector
15 Primary processor connector
16 Accelerated graphics port (AGP) connector
17 Peripheral Component Interconnect (PCI) expansion card connectors (5)
18 3.3-volt (V) power connector
19 Power connector
20 Diskette-drive interface connector
21 Rambus in-line memory module (RIMM) sockets (2)
22 Suspend-to-random-access memory (RAM) light-emitting diode (LED)
23 Primary enhanced integrated drive electronics (EIDE) interface connector
24 Secondary EIDE interface connector
25 Control panel connector
26 External speaker connector