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Figure 4. System board part and connector locations
1 CPU 1 memory slots (6) 19 Clear Complementary Metal Oxide Semiconductor
(CMOS) /Recovery jumper
2 CPU 1 memory fan connector
20 Thermal sensor connector
3 CPU 2 12 V power connector 21 Cover presence switch connector
4 Microprocessor 2
22 Personal System/2 (PS/2) keyboard and mouse connector
5 24-pin power connector 23 Internal speaker connector
6 CPU 2 fan connector
24 Front audio connector
7 CPU 2 memory fan connector 25 PCI card slot
8 CPU 2 memory slots (6) 26 PCI Express x4 card slot (x16 mechanical)
9 Power switch and LEDs connector
27 PCI Express x16 card slot
10 Auxiliary LED connector
28 PCI card slot
11 Right rear fan connector
29 PCI Express x16 card slot
12 Front fan connector
30 PCI Express x1 card slot
13 Card reader connector
31 Auxiliary 12 V power connector
14 Front USB connector
32 Left rear fan connector
15 Front IEEE 1394 connector
33 CPU 1 12 V power connector
16 Hard disk drive connectors (5) 34 CPU 1 fan connector
17 Optical drive connectors (3)
35 Microprocessor 1
18 Battery
10 ThinkStation User Guide