How to check VT-d virtualization support?

Question

Intel

Intel's specs have rather strange processors like the Celeron 3755U that claim to support VT-d. There are also very interesting pieces of iron from China in the PicoITX format, where these processors are placed.

But how to check if I / O virtualization will work in a particular piece of hardware? By "work" I mean exactly the working bunch of processor-chipset-bios.

Once again, this is not about VT-x, but about VT-d!