HP DC7800 - Manual (Page 266)

L3
L4
L5
P1
USB rear port choke (2nd)
USB rear port choke (3rd)
USB front port choke (2nd)
P/S connector (20 or 24 pin)
P2
P3
P4
P5
P6
Second P/S connector (as required)
Processor 12V header
Secondary Processor 12V header
Main Power/HDD LED connector
Speaker connector
P7
P8
P9
P10
P11
Analog audio connector (from CD-ROM)
Primary chassis fan header or primary CPU heatsink fan
Secondary chassis fan header
Diskette drive connector
Auxiliary Audio connector
P12
P13
P15
P16
P17
Alert on LAN connector
VRM module footprint
AUI connector
Fan command/fan sink header (may be 2 or 4 pin)
Digital audio expansion header
P18
P19
P20
P21
P22
SPDIF internal input header
SPDIF internal output header
Primary IDE connector
Secondary IDE/MultiBay connector
Header for NEWCARD
P23
P24
P25
P26
P27
Header for front panel audio
Header for front panel USB
Internal USB connector 1
Internal USB connector 2
MultiBay header
P29
P30
P40
P41
P52
SCSI LED connector
PCI extender slot (female)
Blade PC graphics connector (outboard)
Blade PC graphics connector (inboard)
Second serial port
254 Appendix E System Board and Riser Board Reference Designators