Does enabling hardware x86 virtualization (AMD-V or Intel VT-x) slow down my computer?

Obviously, it improves the performance if I'm running virtual machines, but what if I'm not running any VMs?

  • The Spector and Meltdown OS patches probably has a bigger negative impact on your system speed than enabling VT-x or AMD-V. – Alex Dec 7 '18 at 20:03

No it will not. Most of the recent processors are coming with VT facility and its enabled by default.

  • 3
    VT-x and VT-d are just extra instructions in your CPU. Not using them has the same exact impact as not using any other instructions--none ;) – Marcin Nov 18 '10 at 14:19

Note that I've read that turning on this feature can slow normal operations down by 10-12%, which is why it's normally turned off.

This is a myth.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.