Does one need to reinstall OS after just CPU upgrade?

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Issue

Have a Physical Red Hat Enterprise Linux 6.6 systems running on Cisco UCS B22-M3 and B200-M3 chassis.
They are planned to be upgraded to B200-M4 chassis. Chipset change from C600 to C610 as well as CPU change. Is there a recommended approach for hardware upgrade without re-installation?

Environment

Red Hat Enterprise Linux 6.6

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