2 CPU = 128GB1 CPU = 64GB Server 2016 is supported. You should update your server firmware before installing (should be updated regularly anyway).
I have one r510 server  running windows 2008 server and 8 gb ram Is it compatible witn windows server 2016? What is the max amount of memory i can expand with one cpu? regards
Poweredge r510 - windows server 2016