IBM System x3550 M3 Type 4254 User Manual

Table 8. System board SW4 switch block definition (continued)
Switch
number Default position Description
2 Off When you toggle this switch On and
then Off, you force a power-on,
which overrides the power-on and
power-off button on the server and
they become nonfunctional.
3 Off (Trained service technician only)
Forced power permission. Changing
the position of this switch overrides
the IMM power-on checking process.
4 Off Reserved.
Important:
1. Before you change any switch settings or move any jumpers, turn off the
server; then, disconnect all power cords and external cables. Review the
information in “Safety” on page v, “Installation guidelines” on page 43,
“Handling static-sensitive devices” on page 46, and “Turning off the server” on
page 33.
2. Any system-board switch or jumper blocks that are not shown in the
illustrations in this document are reserved.
System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system
board.
Chapter 2. Installing optional devices 41

IBM System x3550 M3 Type 4254 Specifications

General

Processor	Intel Xeon 5600 series
Max Processors	2
Memory	Up to 192 GB DDR3
Form Factor	1U Rack
Chipset	Intel 5520
Drive Bays	Up to 4 hot-swap 2.5-inch SAS/SATA or SSD
RAID Support	RAID 0, 1, 10
Network Interface	Dual-port Gigabit Ethernet
Power Supply	460W or 675W
Expansion Slots	2 PCIe 2.0
Weight	Approximately 17.24 kg (38 lbs)
Memory Slots	18 (RDIMM) or 12 (UDIMM)