Dell Precision R5500 Owner's Manual page 76

Internal connectors
SATA
Risers
Front USB
Add-in HBA HDD LED
System power
Power distribution board communication
Front panel control
Systems fans
Host card remote power control
CPU/Memory power
Memory
Rear IO:
PCI Express
Serial
Risers:
Outer Riser
Center Riser Option 1:
Center Riser Option 2
Front IO:
Front USB
Internal USB
Front panel control
HDD Back Panel :
SATA
Power
Controls and Lights
Power button light:
System ID button and light
Drive activity light
Network link integrity lights (front):
76 Specifications
PCI Express
PCI
PCI Express
PCI Express
off — system is off or unplugged.
solid blue light — computer is operating normally.
blinking blue light — computer is in stand by.
solid amber light — the computer does not start, indicating a problem with the system board
or power supply.
blinking amber light — indicates a problem has occurred with the system board.
blue light — flashes (front and back of chassis) when the button is pressed. Press the
button again to turn it off.
blue light — blinking blue light indicates that the computer is reading data from, or writing
data to the hard drive.
blue light — A good connection exists between the network and the computer.
two 36-pin Mini-SAS connectors; one seven-pin SATA connector
two 280-pin connectors
one 14-pin connector
one four-pin connector
one 24-pin connector
one six-pin connector
one 28-pin connector
six four-pin connectors
one two-pin connector
two eight-pin connectors
twelve 240-pin connectors (DDR3)
one 98-pin connector (x8)
one 14-pin connector
three 164-pin connectors (x16)
one 120-pin connector (32 bit)
one 164-pin connectors (x16)
two 164-pin connectors (x16)
one 14-pin connector
one four-pin connector
one 28-pin connector
two 36-pin Mini-SAS connectors; six 29-pin HDD connectors
one 14–pin connector