Processor compatibility modes
Processor compatibility modes enable you to migrate logical partitions between servers that have different processor types without upgrading the operating environments installed in the logical partitions.
A processor compatibility mode is a value assigned to a logical partition by the hypervisor that specifies the processor environment in which the logical partition can successfully operate. When you migrate a logical partition to a destination server that has a different processor type from the source server, the processor compatibility mode enables that logical partition to run in a processor environment on the destination server in which it can successfully operate. In other words, the processor compatibility mode enables the destination server to provide the logical partition with a subset of processor capabilities that are supported by the operating environment that is installed in the logical partition.