vSphere DirectPath I/O allows a guest operating system on a virtual machine to directly access physical PCI and PCIe devices connected to a host. Each virtual machine can be connected to up to six PCI devices.

PCI devices connected to a host can be marked as available for passthrough from the Hardware Advanced Settings in the Configuration tab for the host.

Snapshots are not supported with PCI vSphere Direct Path I/O devices.


  • To use DirectPath I/O, verify that the host has Intel® Virtualization Technology for Directed I/O (VT-d) or AMD I/O Virtualization Technology (IOMMU) enabled in the BIOS.
  • Verify that the PCI devices are connected to the host and marked as available for passthrough.
  • Verify that the virtual machine is using hardware version 7 or later.


  1. In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.
  2. On the Hardware tab, click Add.
  3. In the Add Hardware wizard, select PCI Device and click Next.
  4. Select the passthrough device to connect to the virtual machine from the drop-down list and click Next.
  5. Click Finish.