Hardware upgrade

I'm currently running rhev 3.0 with three hosts and rhevh.
I need to upgrade my hardware In the immediate future by adding an additional processor and RAM memory to my existing hosts.
The simple question is: Do I have to reconfigure all my datacenter environment since I'm changing the hardware architecture? Or it would be automatically detected from the hypervisor after reboot?
Is there a documentation available for this situation?

thank you
marcello