I/O-board connectors

The following illustration shows the connectors on the I/O board.

PCIe2 x8
slot 7 slot 6
PCIe2 x8
slot 5
PCIe2 x8
slot 4
PCIe2 x8
slot 1
PCIe2 x16
slot 3
PCIe2 x8
slot 2
PCIe2 x8
(x4 electrically)
Ethernet 1
Ethernet 2
VideoSerialUSB
6 - 7
USB
4 - 5
Internal
USB
Internal
USB
SATA
DVD
Front
USB PCIe
auxiliary
power
Power
supply 1
Power
supply 2
System
management
Ethernet
Battery

Slot 2 is electrically a x4 connector.

36 IBM System x3850 X5 and x3950 X5 Types7145, 7146, 7143, and 7191: Installation and User's Guide