Product : Citrix, XenServer/6.5, Commercial Edition
Feature : Max CPU / Host, Host Config , Hypervisor
Content Owner:  Roman Macek
Summary
160 (logical)
Details
XenServer 6.5 supports up to 160 Logical CPUs (threads) e.g. 4 socket with 8 cores each and Hyper-Threading enabled = 64 logical CPUs