IBM System x3550 M4 Installation And Service Guide

The following table describes the jumpers on the system board.
Table 2. System board jumpers
Jumper number Jumper name Jumper setting
JP1 CMOS clear jumper
v Pins 1 and 2: Normal (default).
v Pins 2 and 3: Clears the real-time
clock (RTC) registry.
JP2 UEFI boot backup 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.
JP6 System TPM physical
presence jumper
v Pins 1 and 2: Normal (default).
v Pins 2 and 3: Indicates a physical
presence to the system TPM.
Notes:
1. If no jumper is present, the server responds as if the pins are set to the default.
2. Changing the position of the UEFI boot backup jumper (JP2) from pins 1 and 2 to pins
2 and 3 before the server is turned on alters which flash ROM page is loaded. Do not
change the jumper pin position after the server is turned on. This can cause an
unpredictable problem.
Figure 17. System-board switches, jumpers, and buttons
30 IBM System x3550 M4 Type 7914: Installation and Service Guide

IBM System x3550 M4 Specifications

General

Processor	Intel Xeon E5-2600 series
Chipset	Intel C600 series
Memory	Up to 768 GB
Storage	Up to 8 x 2.5" hot-swap drives
Form Factor	1U rack
Power Supply	750 W AC
Network Interface	4 x 1 GbE
RAID Support	RAID 0, 1, 10
Expansion Slots	3 x PCIe 3.0 slots
Operating System Support	Windows Server, RHEL, SUSE, VMware
Management	Integrated Management Module II (IMM2)