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4K/5K monitors: when your RDP session has small black bands limiting the height/width to 2048/4096 pixels

Posted by jpluimers on 2016/08/29

Sometimes RDP limits you to 2048 pixels vertical (or 4096 pixels horizontal)

Sometimes RDP limits you to 2048 pixels vertical (or 4096 pixels horizontal)

Just found out why on some Windows versions, the RDP sessions form my 4K monitor has some small black bands on top/bottom: older versions of Windows limit their RDP server to 4096 x 2048.

A 4K monitor will not hit the width limit (as 4K cheats: it is usually “just” 3840 pixels wide), but it does hit the height limitation (2160 is slightly more than 2048: you miss 112 pixels that show as two small black bands).

A 5K monitor is worse: it will hit both limits (5K does not cheat: at 5120 × 2880 it is exactly 5*1024 pixels wide) so you miss 124 pixels horizontally and a whopping 832 pixels vertically.

Don’t buy a 5K monitor yet if you do a lot of RDP work to older Windows versions.

The link below has a table listing various Windows versions, but it omits end-of-life versions so I’ve done some testing: Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2003 R2 share the same limitations as Windows Server 2008 most likely because their latest service packs share the same RDP 6.1 version.

I updated this in the table:

Destination Endpoint Remote Desktop Protocol Version Max Resolution Per Monitor Max Virtual Desktop Limit RemoteFX vGPU max resolution (guest VM)
Windows XP SP3 RDP 6.1 4096 (w) x 2048 (h) 4096 (w) x 2048 (h) N/A
Windows Server 2003 SP2 RDP 6.1 4096 (w) x 2048 (h) 4096 (w) x 2048 (h) N/A
Windows Server 2003 R2 RDP 6.1 4096 (w) x 2048 (h) 4096 (w) x 2048 (h) N/A
Windows Vista SP1 RDP 6.1 4096 (w) x 2048 (h) 4096 (w) x 2048 (h) N/A
Windows Server 2008 RDP 6.1 4096 (w) x 2048 (h) 4096 (w) x 2048 (h) N/A
Windows Server 2008 R2 RDP 7.0 4096 (w) x 2048 (h) 32766 x 32766 N/A
Windows 7 SP1 RDP 7.1 4096 (w) x 2048 (h) 32766 x 32766 vGPU: 1920×1200 (2 monitors)
Windows Server 2012 RDP 8.0 8192 x 8192 32766 x 32766 N/A
Windows 8 RDP 8.0 8192 x 8192 32766 x 32766 vGPU: 2560×1600 (2 monitors)
Windows Server 2012 R2 RDP 8.1 8192 x 8192 32766 x 32766 N/A
Windows 8.1 RDP 8.1 8192 x 8192 32766 x 32766 vGPU: 2560×1600 (2 monitors)
Windows Server 2016 RDP 10 8192 x 8192 32766 x 32766 vGPU: 4K (1 monitor)
Windows 10 RDP 10 8192 x 8192 32766 x 32766 vGPU: 4K (1 monitor)

–jeroen

Via: Remote Desktop Protocol Maximum Supported Resolutions – TechNet Articles – United States (English) – TechNet Wiki

 

 

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