Designator Silk screen Component
P11 P11 AUX IN Auxiliary audio connector
P12 P12 MCH fan header
P20 P20 IDE IDE connector
P23 P23 FRONT AUDIO Front panel audio header
P24 P24 Front panel USB header
P25 P25 Internal USB header
P29 P29 HDD LED connector
P53 P53 Serial port connector
P60-P63 SATA0 - SATA3 SATA Connectors
P66-P67 SATA4 - SATA5 SATA Connectors
P70 P70 Primary processor fan header
P71 P71 CPU1 FAN Second processor fan header
P80-P87 SAS0 - SAS7 SAS/SATA connectors
P124 P124 Hood lock header
P130 P130 PCI FAN System fan header
P131 P131 Memory fan header
XBT2 XBT2 BAT Battery socket
XMM1 – XMM8 XMM1 – XMM8
DIMM1 – DIMM8
Memory slots
U1 U1 Primary processor socket
U2 U2 Second processor socket
168 Appendix B Appendix B—System board designators ENWW