How to Run VMs on a Non-VT-x Compatible CPU: Solutions and Alternatives

Virtualization has revolutionized the way we use technology, allowing us to run multiple operating systems and applications on a single physical machine. However, not all CPUs come equipped with the necessary hardware support for virtualization, particularly the VT-x (Virtualization Technology for x86) feature. If your CPU does not support this feature, running virtual machines (VMs) can be a challenge, especially with 64-bit guest operating systems. In this article, we will explore the limitations and possible solutions to still run virtual machines on such a system.

What is VT-x and Why do You Need It?

Virtualization technology relies on hardware-level support to function efficiently. VT-x is one of the most important features in this category, providing hardware assistance for running virtual machines. Without VT-x, certain virtualization operations cannot be performed, which is why you might encounter errors such as 'CPU not supported' when trying to install a 64-bit guest OS.

Running a 32-bit OS as a Guest VM

One of the most straightforward solutions is to run a 32-bit operating system as a guest VM. Most modern CPUs have hardware support for 32-bit virtualization, and this is usually sufficient for most applications and services. To do this, you can:

Select a 32-bit version of your preferred operating system from the virtualization software’s installer. Configure your virtual machine settings to boot from the 32-bit ISO or install media. Install and configure your VM as usual.

While this method allows you to run a broad range of applications, it might not be the best choice for resource-intensive or security-sensitive applications, which typically require a 64-bit environment.

Running Other 64-bit Guest OSes Without VT-x

Unfortunately, if you need to run a 64-bit guest OS and your CPU lacks VT-x support, you are limited in your options. There are a few methods to consider:

Alternative Virtualization Software

Not all virtualization software requires VT-x for 64-bit guest OSes. For instance, VMware Workstation does not rely on VT-x for running 64-bit virtual machines on some CPUs. Hyper-V, provided with Windows Server and Windows 10, also offers compatibility with certain CPUs that do not support VT-x. However, these solutions may not be as performant or feature-rich as those that do use VT-x, and your mileage may vary depending on the specific CPU and software version.

Using VMware in No-VT Mode

VMware has a legacy support mode called Bocy, which does not require VT-x. To activate this mode:

Download and install the latest version of VMware Workstation or VMware Player. Create a new virtual machine and select the 64-bit OS you wish to install. Install the VM normally using the appropriate media. Once the installation is complete, go to the VM settings and select the 'Other' option under the 'Processor' tab. Select the 'Bocy' hypervisor implementation and disable 'Enable VT-x/AMD-v.' Save and start the VM to see if it runs successfully without VT-x support.

Conclusion: Exploring Your Options

Virtualization on a CPU without VT-x support can be challenging, but it is not impossible. By choosing a 32-bit guest OS or selecting alternative virtualization software, you can still take advantage of the benefits of virtualization. While these methods may not offer the same performance and features as those that use VT-x, they can still serve as viable solutions for many users.

It's vital to evaluate your specific needs and system requirements to determine the best course of action. Whether you choose to stick with a 32-bit OS or explore alternative virtualization methods, you can continue to run virtual machines on your system. Always consult the documentation of the virtualization software and your CPU manufacturer for the most accurate and up-to-date information.