Rear panel
The rear panel contains I/O ports, network interface ports, power supplies, and two hard disk drive carriers.
I/O ports
The I/O ports are color-coded per the PC 99 specification. The locations of the various I/O ports are shown in the following figure.

- Rear Loading Boot Drive Carrier LEDs
- At the bottom of the boot drive carrier, the left LED shows Power, and is Blue when power is on; the right LED shows Activity, and flashes green when there is activity.
- 10 GbE NIC Card LEDs
- Each SFP connector on the four-port NIC card has two LEDs. The Upper LED indicates link speed (Blue = 10G link, Yellow = 1G link), and the bottom LED indicates Link/Activity (Link = green, Activity = flashing green).
- Onboard 1 GbE NIC LEDs
- Each of the two RJ45 1 GbE connectors on the back panel has two built-in LEDs. The left LED indicates Link/Activity (Link = green, Activity = flashing green), and the right LED indicates Link Speed (Amber = 1 Gb/s, Green = 100 Mb/s, and Off = 10 Mb/s).