Lenovo ThinkCentre M57p - Manual (Page 17)

Identifying parts on the system board
Figure 4 shows the location of parts on the system board.
1 4 - Pin power connector 9 Clear CMOS/Recovery jumper
2 Memory connectors 10 PCI-e X16 connector
3 Front audio connector 11 PCI connector
4 Battery 12 Diskette drive connector
5 24-Pin power connector 13 Microprocessor fan
6 SATA connector 14 Cover presence switch (Tamper switch)
7 System fan 15 Temperature sensor connector
8 USB connector (front) 16 Microprocessor and heat sink
Figure 4. System board parts locations
Chapter 2. Overview 9