Why do graphical artifacts appear when enabling RemoteFX?

Question

Iron

I wanted to experiment with VDI and RemoteFX. I dug up the server, modified the video card with a file (I found an Nvidia GT 640 at hand, which underwent a PCI-E x16 -> PCI-E x8 conversion), assembled a lab on Windows Server 2012 R2 and Windows 8.1 Enterprise. When you turn on RemoteFX and add a virtual adapter to the VM, terrible graphic artifacts begin in the guest system: the entire screen is filled with random colors, pieces of previous frames remain on the screen when scrolling, pixelation, and other things that are familiar to owners of burnt video adapters.
At first, it was the video card that seemed to be the reason - in the end, I sawed off a piece of the slot for it. But that evening, I reproduced the test environment on a home computer with a known working Nvidia GT 960, which was not subjected to any atrocities. And yet, the artifacts were present in full.
Searching the Internet turned up nothing: in the comments on articles about RemoteFX in Server 2012 on Technet, people complained about similar problems, but no one answered them.

Answer 1

There were similar problems when the network could not cope.
Do you meet the conditions: social.technet.microsoft.com/wiki/contents/article... ?