Designator Silkscreen Component
P71 CPU1_FAN Secondary processor fan header
P8, P9 CH_FAN1, CH_FAN2 Chassis fan headers
P93 PCI FAN PCI fan header
P92 MEM_FAN Memory fan header
P125 MCH_FAN Chipset fan header
XBT BAT Battery retainer
XMM1 — XMM8 DIMM1 — DIMM8 Memory slots
U1 XU1 Primary processor socket
U2 XU2 Secondary processor socket
E15 E15 Crisis recovery header/jumper
P124 P124 Solenoid hood lock header
P20 IDE IDE device connector
158 Appendix B Appendix B—System board component designators ENWW