Dell Precision Rack 7910 Owner's Manual page 119

Internal connectors
Internal USB
System power
Power distribution board communication
Front panel control
Systems fans
Host card remote power control
CPU/Memory power
Memory
Risers:
Riser 1
Center Riser Option 3: Default
Left Riser
Front IO:
Front USB
Front panel control
HDD Back Panel :
SATA
Power
Table 15. Controls and Lights
Controls and Lights
Power button light:
System ID button and light
Drive activity light
Network link integrity lights
(front):
PCI Express
PCI Express
PCI Express
Specification
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.
Specification
One 4-pin, USB 3.0-compliant
one 24-pin connector
one six-pin connector
one 28-pin connector
six four-pin connectors
one two-pin connector
four four-pin connectors
twenty four 240-pin connectors (DDR4)
three 164-pin connectors (x8)
two 164 pin connectors (x8)
one 164 pin or two 164 pin
one 14-pin connector
one 28-pin connector
two 36-pin Mini-SAS connectors; eight 29-pin
HDD connectors
one 14–pin connector
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