Different amounts of RAM in Hyper-V Hosts

Hi there,

I have a client with a Windows Server 2016 Hyper-V failover cluster consisting of 2 DL 380's with 1024 GB RAM on each.

The client is running out of CPU resources and is considering buying a new server (another DL 380) to join to the cluster. Is it necessary to have the same amount of RAM (1024 GB) on the new host or can we install less RAM?

Will installing less RAM on the additional cause the cluster validation wizard to fail and will this configuration be supported by Microsoft? I cannot seem to find any official guidance.

Thanks.