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---
layout: doc
title: HCL
permalink: /en/doc/hcl/
redirect_from:
- /doc/HCL/
- /wiki/HCL/
- /wiki/HCLR1/
- /wiki/HCL-R2B2/
---
Hardware Compatibility List (HCL) for All Qubes OS Releases
===========================================================
The [HCL](/hcl) is a compilation of reports generated and submitted by users across various Qubes versions.
**Note:**
Except in the case of developer-reported entries, the Qubes team has not independently verified the accuracy of these reports.
Please first consult the data sheets (CPU, chipset, motherboard) prior to buying new hardware for Qubes.
Meet the [SystemRequirements](/en/doc/system-requirements/) and search particular for support of:
- HVM ("AMD virtualization (AMD-V)", "Intel virtualization (VT-x)", "VIA virtualization (VIA VT)")
- IOMMU ("AMD I/O Virtualization Technology (AMD-Vi)", "Intel Virtualization Technology for Directed I/O (VT-d)")
- TPM ("Trusted Platform Module (TPM)" connected to a "20-pin TPM header" on motherboards.)
Test the hardware yourself, if possible.
If using the list to make a purchasing decision, we recommend that you choose hardware with:
- the best achievable Qubes security level (green columns in HVM, IOMMU, TPM)
- and general machine compatibility (green columns in Qubes version, dom0 kernel, remarks).
Generating and Submitting New Reports
-------------------------------------
In order to generate a HCL report in Qubes, simply open a terminal in dom0 (KDE: start-menu -\> System Tools -\> Konsole or Terminal Emulator)
and run `qubes-hcl-report <vm-name>`, where `<vm-name>` is the name of the VM to which the generated HCL files will be saved.
(Note: If you are working with a new Qubes installation, you may need to update your system in order to download this script.)
You are encouraged to submit your HCL report for the benefit of further Qubes development and other users.
If you would like to submit your HCL report, please send the **HCL Info** `.txt` file to [\`qubes-users@googlegroups.com\`](/en/doc/qubes-lists/) with the subject `HCL - <your machine model name>`.
Please include any useful information about any Qubes features you may have tested (see the legend below), as well as general machine compatibility (video, networking, sleep, etc.).
If you have problems with your hardware try a different kernel in the [Troubleshooting menu](/doc/InstallationGuideR2rc1/#troubleshooting-problems-with-the-installer).
Please consider sending the **HCL Support Files** `.cpio.gz` file as well.
**Please note:**
The **HCL Support Files** may contain numerous hardware details, including serial numbers. If, for privacy or security reasons, you do not wish to make this information public, please **do not** send the `.cpio.gz` file to the public mailing list.

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---
layout: doc
title: SystemRequirements
permalink: /en/doc/system-requirements/
redirect_from:
- /doc/SystemRequirements/
- /wiki/SystemRequirements/
---
System Requirements
===================
Minimum
-------
- 64-bit Intel or AMD processor (x86\_64 aka x64 aka AMD64)
- 4 GB RAM
- 32 GB disk space
- legacy boot mode ([UEFI not supported yet](https://github.com/QubesOS/qubes-issues/issues/794))
Recommended
-----------
- Fast SSD (strongly recommended)
- Intel GPU (strongly preferred)
- Nvidia GPUs may require significant [troubleshooting](/en/doc/install-nvidia-driver/).
- ATI GPUs have not been formally tested (but see the [Hardware Compatibility List](/hcl/)).
- Intel VT-x or AMD-v technology (required for running HVM domains, such as Windows-based AppVMs)
- Intel VT-d or AMD IOMMU technology (required for effective isolation of network VMs)
- TPM with proper BIOS support (required for [Anti Evil Maid](http://theinvisiblethings.blogspot.com/2011/09/anti-evil-maid.html))
Important Notes
---------------
- Qubes **can** be installed on systems which do not meet the recommended requirements. Such systems will still offer significant security improvements over traditional operating systems, since things like GUI isolation and kernel protection do not require special hardware.
- Qubes **can** be installed on a USB flash drive or external disk, and testing has shown that this works very well. A fast USB 3.0 flash drive is recommended for this. (As a reminder, its capacity must be at least 32 GB.) Simply plug the flash drive into the computer before booting into the Qubes installer from a separate installation medium, choose the flash drive as the target installation disk, and proceed with the installation normally. After Qubes has been installed on the flash drive, it can then be plugged into other computers in order to boot into Qubes. In addition to the convenience of having a portable copy of Qubes, this allows users to test for hardware compatibility on multiple machines (e.g., at a brick-and-mortar computer store) before deciding on which computer to purchase. (See [here](/doc/HCL/#generating-and-submitting-new-reports) for advice on hardware compatibility testing.) Keep in mind to also change assigned devices for your netvm and usbvm, if you move between different machines.
- Installing Qubes in a virtual machine is not recommended, as it uses its own bare-metal hypervisor (Xen).
- Macintosh PCs are not currently supported due to keyboard and mouse problems - details in \#230. (Patches welcome!)
- [Advice on finding a VT-d capable notebook](https://groups.google.com/d/msg/qubes-users/Sz0Nuhi4N0o/ZtpJdoc0OY8J).