Designator Silk screen Component
P26 P26 IUSB2 Internal dual USB header
P27 P27 IUSB1 Internal single USB header
P28 FRNT AUD Front panel audio header
P29 P29 HDD LED Hard drive LED connector
P53 P53 Serial port connector
P60-P63 P60-P63
SATA0-SATA3
SATA Connectors
P66-P67 P66-P67
SATA4-SATA5
SATA Connectors
P70 P70 CPU0 FAN Primary CPU fan header
P71 P71 CPU1 FAN Secondary CPU fan header
P80-P87 P80-P87
SAS0-SAS7
SAS/SATA connectors
P91 P91 MEM FANS Memory fans connector
P93 P93 FRNT FAN1 Front fan header
P94 P94 FRNT FAN2 Front fan header
XBT XBT BAT Battery holder
XMM1 -XMM12 CPU0 - DIMM1 to CPU0 - DIMM6
CPU1 - DIMM1 to CPU1 - DIMM6
Memory slots
XU1 XU1 CPU0 Primary CPU socket
XU2 XU2 CPU1 Secondary CPU socket
282 Appendix B System board designators ENWW