Basic VT-x functionality was introduced in ESX 3.0. The following table indicates when support was added to ESX(i) for new Intel VT-x features as hardware support for virtualization evolved.
| VT-x Feature | ESX(i) Release |
|---|---|
| NMI window exiting | ESX 3.5 |
| Virtualize APIC accesses | ESX(i) 4.0 |
| Enable EPT | ESX(i) 4.0 |
| Enable VPID | ESX(i) 4.0 |
| WBINVD exiting | ESX(i) 4.0 |
| Enable RDTSCP | ESX(i) 4.0 |
| Unrestricted guest | ESXi 5.0 |
| PAUSE-loop exiting | ESXi 5.0 |
| RDRAND exiting | ESXi 5.0 |
| Virtualize x2APIC mode | ESXi 5.1 |
| Enable INVPCID | ESXi 5.1 |
| APIC-register virtualization | ESXi 5.5 |
| Virtual interrupt delivery | ESXi 5.5 |