Lenovo Flex System x440 Compute Node Installation And Service Manual page 943

Table 15. Supported CPU installation combinations
Number of
microprocessors
1
2
4
Notes:
1. CPU0 is the boot strap processor.
2. If a bad processor in microprocessor socket 1 causes the processor installed in microprocessor socket 2 to
become the boot strap processor and is subsequently replaced, the processor ordering reverts to the default CPU
IDs for the new number of CPUs, because the FPGA would not hold the last CPU ID assignments and "add in" the
replaced processor.
3. Three-processor configurations are not supported.
4. A microprocessor failure in a four-processor configuration will result in the system failing down to three functional
microprocessors.
The supported microprocessor configurations are shown in the following illustrations.
Microprocessors Microprocessors
socket 1
CPU0
CPU0
CPU0
Chapter 7
Microprocessors
socket 2 socket 3
CPU1
CPU1 CPU2
.
Installing, removing, and replacing compute node components
Microprocessors
socket 4
CPU3
933