I don't know what happen but I had had not the possibility to work fluid with a second monitor as preview. Every time I try to rippler a clip, my main monitor seems a flash. And to move a clip become too slow by 3 or 4 seconds.
I tryed many driver versions. HP and AMD.
WINDOWS 10 PRO 64 BITS
XEON E5-1680 V4
64 GB RAM
M.2 HP Z TURBO DRIVE OS
SSD CRUICIAL MX300 1TB FILES
RADEON PRO WX 7100
700W POWER SUPPLY
This is from AMD concerning Eyefinity for Professional GPU cards: AMD Eyefinity Technology for Professionals | AMD
Also this may be useful, Eyefinity FAQ on Setting up and Configuring : https://support.amd.com/en-us/kb-articles/Pages/MultimonitorFAQ.aspx
This is the latest AMD Professional Driver for the WX7100 GPU card.: Workstation .
Here is the AMD Release notes concerning the Beta version : Radeon Pro Software Adrenalin Edition 18.5.2 Beta Release Notes and regular Pro Enterprise Release notes: Radeon Pro Software Enterprise Edition 18.Q2.1 Release Notes .