IBM System x3550 M3 Type 4254 Problem Determination And Service Guide

System-board switches and jumpers
The following illustration shows the location and description of the switches and
jumpers.
Note: If there is a clear protective sticker on the top of the switch blocks, you must
remove and discard it to access the switches.
Table 2. System board jumpers
Jumper number Jumper name Jumper setting
J29 UEFI boot recovery jumper
v Pins 1 and 2: Normal
(default) Loads the primary
server firmware ROM
page.
v Pins 2 and 3: Loads the
secondary (backup) server
firmware ROM page.
J147 IMM recovery jumper
v Pins 1 and 2: Normal
(default) Loads the primary
IMM firmware ROM page.
v Pins 2 and 3: Loads the
secondary (backup) IMM
firmware ROM page.
18 IBM System x3550 M3 Types 4254 and 7944: Problem Determination and Service Guide

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)