If you look in the benchmark Table from Corona bnechmark on their site you can thee this:
http://forums.cgarchitect.com/82906-how-many-cpus-board-does-support-vray-corona.html
As far as i know, the benchmark does not use DR, so this maschine Contains 8 CPU's
Corona can handle this, for 4 CPU's you can use the new Windows 10 Workstation,
for more you need a Windows Server OS
regards