Dell Precision R5400 (Mid 2008) - Manual (Page 23)

Specifications
23
PS/2 (keyboard and mouse) two back panel 6-pin mini-DIN
Serial two back panel 9-pin connectors
(16550C-compatible)
Audio two back panel connectors (line-in and line-out)
System board connectors:
Serial ATA three 7-pin connectors
Internal USB one 10-pin connector
Fans two 4-pin connectors
two 5-pin connectors
PCI (on center riser) one 124-pin connector
PCI-X (on center riser) one 188-pin connector
PCI Express x8 (on center
riser) one 164-pin connector
PCI Express x16 (on outer
riser) two 164-pin connectors
Front control panel one 20-pin connector
Front panel USB one 10-pin connector
Processor two 775-pin connectors
Memory four 240-pin connectors
Power 12 V three 6-pin connectors
Power (main) one 24-pin connector
Connectors (continued)