ESXi 5.1 free version – limits

As was already announced vRAM limits are gone from commercial vSphere licensing packages, the same on ESXi5 free version.  But it doesn’t mean that ESXi 5 free version has not physical and functional limits.


  • Hard limit on physical RAM up to 32GB RAM – server will not boot if there is more RAM installed
  • Not writable API – you can’t execute PowerCLI scripts against ESXi free version
  • No clonning of VM
  • No Alarms support
  • No SNMP support


  • Number of CPU sockets are not limited
  • manageability by vSphere client

Artur Krzywdzinski

Artur is Consulting Architect at Nutanix. He has been using, designing and deploying VMware based solutions since 2005 and Microsoft since 2012. He specialize in designing and implementing private and hybrid cloud solution based on VMware and Microsoft software stacks, datacenter migrations and transformation, disaster avoidance. Artur holds VMware Certified Design Expert certification (VCDX #077).