I'am planning to use ESXi 6.0 U3 (my server has 3 cpu sockets). While i was checking VMware's compatibility guide i realized that the number of sockets that i can choose from the drop down menu does not include 3 sockets. Is it possible to use 3 sockets ?
Three sockets are pretty uncommon for computers. What system (vendor/model) is this?
Assuming that it's not on VMware's HCL anyway (i.e. not officially supported), you may simply give it a try, and install the Hypervisor to see whether it works.