Toshiba Magnia Z500 - Manual (Page 103)

Installing and Removing Hardware
CPU module
84
NOTE: When a CPU module is extended, the operating sys-
tem (OS) may have to be reinstalled for recognition of a new
CPU module.
The CPU modules with different CPU speeds cannot be used
together. Confirm the CPU speed of your model when pur-
chasing a CPU module, and be sure to purchase a CPU
module with the same CPU speed.