Have a look here.
http://www.vmware.com/ap/products/vsphere-hypervisor/gettingstarted.html
Specifications
- Unlimited number of cores per physical CPU
- Unlimited number of physical CPUs per host
- Maximum vCPUs per virtual machine: eight
- Limitation of 32GB RAM limit per server/host has been removed from the free Hypervisor.
- Operating system support: Microsoft OS (18 versions), Linux (54 versions), Mac OS X 10, Solaris, FreeBSD, etc. (See a complete list of supported versions.)