Lenovo Personal Computer 4263 User Manual Page 20

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