Dell Precision R5500 (Early 2011) - Manual (Page 93)

Drives
Externally accessible:
slimline SATA optical bays one
2.5 inch drive bays five SATA drives with onboard Intel controller or six SAS
drives with SAS/PERC 6iR cards
Internally accessible none
External connectors
Audio stereo out, Mic/Line In
Network two RJ-45
Serial one 9-pin connector, 16550C-compatible
USB front panel: 2; rear panel: 4
Video video card dependant
System ID Cable Management Arm (CMA) remote LED connector
Internal connectors
SATA two 36-pin Mini-SAS connectors; one seven-pin SATA
connector
Risers two 280-pin connectors
Front USB one 14-pin connector
Add-in HBA HDD LED one four-pin connector
System power one 24-pin connector
Power distribution board communication one six-pin connector
Front panel control one 28-pin connector
Systems fans six four-pin connectors
Host card remote power control one two-pin connector
CPU/Memory power two eight-pin connectors
Memory twelve 240-pin connectors (DDR3)
Rear IO:
PCI Express one 98-pin connector (x8)
Serial one 14-pin connector
Risers:
Outer Riser
PCI Express three 164-pin connectors (x16)
Center Riser Option 1:
PCI one 120-pin connector (32 bit)
PCI Express one 164-pin connectors (x16)
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