Product : Citrix, XenServer/7.5, Enterprise
Feature : Max CPU / Host, Host Config , Hypervisor
Content Owner:  Roman Macek
Summary
288 (logical)
Details
XenServer 7.5 supports up to 288 Logical CPUs (threads) e.g. 8 socket with 18 cores each and Hyper-Threading enabled = 288 logical CPUs