CPU Compatibility on same cluster

Hi all,

Im planning to install RHEV Hypervisor on this node bellow, its possible to join this cpu type on same cluster?

HP Proliant BL680c-G5:
Intel Xeon E7440 (2.40 GHz/4-core/16MB/90 W) Processor

HP Proliant BL460c-G5:
Intel® Xeon® Processor E5450
(12M Cache, 3.00 GHz, 1333 MHz FSB)

thnks