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---
features:
- |
Hyper-V RemoteFX feature.
Microsoft RemoteFX enhances the visual experience in RDP connections,
including providing access to virtualized instances of a physical GPU to
multiple guests running on Hyper-V.
In order to use RemoteFX in Hyper-V 2012 R2, one or more DirectX 11
capable display adapters must be present and the RDS-Virtualization
server feature must be installed.
To enable this feature, the following config option must be set in
the Hyper-V compute node's 'nova.conf' file::
[hyperv]
enable_remotefx = True
To create instances with RemoteFX capabilities, the following flavor
extra specs must be used:
**os:resolution**. Guest VM screen resolution size. Acceptable values::
1024x768, 1280x1024, 1600x1200, 1920x1200, 2560x1600, 3840x2160
'3840x2160' is only available on Windows / Hyper-V Server 2016.
**os:monitors**. Guest VM number of monitors. Acceptable values::
[1, 4] - Windows / Hyper-V Server 2012 R2
[1, 8] - Windows / Hyper-V Server 2016
**os:vram**. Guest VM VRAM amount. Only available on
Windows / Hyper-V Server 2016. Acceptable values::
64, 128, 256, 512, 1024
There are a few considerations that needs to be kept in mind:
* Not all guests support RemoteFX capabilities.
* Windows / Hyper-V Server 2012 R2 does not support Generation 2 VMs
with RemoteFX capabilities.
* Per resolution, there is a maximum amount of monitors that can be
added. The limits are as follows:
For Windows / Hyper-V Server 2012 R2::
1024x768: 4
1280x1024: 4
1600x1200: 3
1920x1200: 2
2560x1600: 1
For Windows / Hyper-V Server 2016::
1024x768: 8
1280x1024: 8
1600x1200: 4
1920x1200: 4
2560x1600: 2
3840x2160: 1
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