Question about Mixing E series and X series Intel cpu's in a 2012 r2 hyper-v cluster


 I had a quick question on a cluster. Since this is a production cluster I wanted to double check for clarification.  Currently have a 3 node 2012 R2 hyper-v cluster. The servers are all Dell R610's with Dual Intel E5540 processors.  I wanting to introduce a 4th node into the cluster only I was thinking of doing an R610 with Dual X5570 processors for a little more power.  My questions is, since these are all R610's and the processors are all from the same generation/release date, would I still have to go through and mark the checkbox on all the VM's for the "migrate to a physical computer with a different processor version"?  Or since they are the sam Generation would everything work as normal.  Any other pitfalls I'm missing?

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Muhammad BurhanManager I.T.Commented:
Nothing to do with that, the cluster test also warn you about your question. Just ignore that warnings.
We already see these matters in past. Everything is running normally at our side from deployment till now.

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NWAtechAuthor Commented:
Thanks.  So just to verify I can add in the R610 server with the Xseries cpu's to the cluster and not have to manually check all the VM's on the other three servers with the "migrate to a different cpu" checkbox?
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Configure the additional node identical to the others _including_ patch level.

Once it has been added to the cluster run a Live Migration from each of the other nodes. If it succeeds for each LM test then you're good to go.

If it does not succeed and the error indicates CPU compatibility issues then there is a setting in each VM's setup that must be enabled for CPU compatibility.

Once all of the above is worked out run Cluster Aware Updates to get all nodes to the same patch level!

EDIT: By "identical" I mean at all levels: Firmware, BIOS, OS, and Drivers.
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