• Server OS VDAs (Virtual Apps / XenApp) – Supports up to 8 monitors. Display resolution is only limited by the Windows OS capabilities or the available video memory for the machine. The amount of video memory that a Citrix session can consume can be configured via Citrix policy. The default value for the Display memory Limit policy is 65536KB and this is sufficient for up to 2x4K monitors (2x32400KB).
• Desktop OS VDAs (Virtual Desktops / XenDesktop)
  • Windows 7 – Supports up to 8 monitors. Display resolution is limited to 4094 pixels in any dimension. The VDA must have sufficient memory allocated to support the desired configuration. Refer to CTX200257 - Screen Issues Connecting to 4K Resolution Monitors for additional information.
  • Windows 10 – Supports up to 8 monitors. Display resolution is limited to 4094 pixels in any dimension on 7.15 LTSR VDAs. On 7.16 and greater VDAs, display resolution is only limited by the Windows OS capabilities or the available video memory for the machine. The amount of video memory that a Citrix session can consume can be configured via Citrix policy. The default value for the Display memory Limit policy is 65536KB and this is sufficient for up to 2x4K monitors (2x32400KB).
• GPU-enabled Desktop OS VDAs (HDX 3D Pro) – Maximum resolution and number of monitors is strictly dependent on the GPU capabilities. For example, supported NVIDIA GPUs may support display resolutions up to 4096x2160 and up to 4 monitors depending on type or vGPU profile and license in use. Refer to CTX131385 - HDX 3D Pro GPU Support and Deployment Considerations for more information.
• Linux VDAs – Standard VDAs support up to nine monitors, and HDX 3D Pro VDAs support up to four monitors. The Linux VDA provides the out-of-the-box multi-monitor support with a default resolution of 2560×1600 per monitor. Refer to CTX220128 - How to Configure Multi-Monitor Support on the Linux VDA for more information.

Citrix Workspace App 1912 For Mac Pro

High-DPI (dots per inch)

Citrix Workspace App 1912 For Mac Pro

Performance and scalability considerations

In the context of display remoting the size of a user session can vary significantly based on display resolution and the number of monitors alone. As the session grows in size more server and client resources are required, for rendering and encoding/decoding of the graphics, and more data needs to be sent from the server to the client via the network. This has a direct impact to session performance and server scalability. Citrix highly recommends taking user requirements with respect to display configuration into account as it relates to server hardware, network links, and endpoint devices. Some deployment considerations are listed below:

• Both display resolution and the number of monitors increase the session size. A user connecting from and endpoint with a single 4K monitor would result in the same session size as a user connecting with four 1080p monitors. Single server scalability can be reduced significantly by simply upgrading user endpoints with 4K monitors. If 4K monitor support is required additional server resources should be allocated accordingly to maintain desired user density levels.
• Bandwidth requirements will also increase with higher resolutions and the number of monitors in use. Bandwidth constraints could limit frame rates and reduce image quality affecting session interactivity and user experience as a result.
• The endpoint device must have adequate hardware resources available to support the desired display configuration. This could mean having enough CPU resources and in some cases a GPU that can handle the graphics workload. Performance limitations of Thin Clients may become apparent at high resolutions such as 4K, for example.

Additional Resources

Citrix Workspace App 1912 For Mac Os