Which EVC mode need for cluster with Intel E5645 and E5-2630

Hi All,

We have one HA cluster with four identical nodes with the following configuration.

Model=Fujitsu-Primergy RX200 S6

CPU=Intel Xeon E5645 @ 2.40GHz

Now, we need to add one host with CPU of Intel Xeon E5-2630 @ 2.30 GHz. I aware Enhanced vMotion Compatibility creates the baseline and suppress the new features compare than old one. But,when i enable EVC i can see there following EVC modes. Which mode i need to select for the mixed cluster with E5645 and E5-2630 Processors.