Cisco Systems UCS C420 manual 2shows the rear panel features of the server

Chapter 1 Overview of the Cisco UCS C420 Server

Figure 1-2shows the rear panel features of the server.

Figure 1-2	Rear Panel Features
	1	2		3		4
	PCle 1
				2	3	4	5	6
	PSU 1			PCle	PCle	PCle	PCle	PCle
	7	8	9	10		11

5 6

PCle 7

PSU 2

12 13 334349

1	Horizontal PCIe slot 1 on riser card	9	Rear system fault LED
	(full-height, half-length, x16, with NCSI)
2	Power supply 1	10	VGA video connector
3	RS-232 serial connector	11	Optional RAID controller cards
			(up to 2, supported in designated
			PCIe slots 3 and 5)
4	PCIe slots 2 through 6 on motherboard	12	1-Gb Base-T LOM ports (four, RJ-45)
	(five half-height, half-length, x8 slots).
	PCIe slot 4 supports NCSI.
5	Horizontal PCIe slot 7 on riser card	13	Rear identification button and LED
	(full-height, half-length, x16, with NCSI)
6	Power supply 2
7	USB 2.0 ports (three)
8	10/100/1000 dedicated management Ethernet
	port (RJ-45)

Cisco UCS C420 Server Installation and Service Guide

1-2 OL-27640-01