I upgraded few ESX hosts (and VC) to vSphere/vCenter. Almost everything works fine (at least windows machines). But I have 2 linux VMs (centos 5.2) that after upgrading their hardware to version 7, can't be vmotioned/svmotioned while powered on, because it says
"Host CPU is incompatible with the virtual machine requirements at CPUID level 0x1 register 'ecx'.
I googled for it, but every result points to server incompatibilities. But here all servers are exactly the same (dell pe2950 with the same cpu). and also other VMs (also linux ones-centos) work fine. This just happened for 2 my vms. Of course I can shut it down, and migrate, but I would like it to work online 
Am I missing something?
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