Since a month in addition to Prepar3D v4, I now also have Prepar3D v5.1, together with the 737-800 NGXu from PMDG.
I also connected a Combo II from VRinsight and the software Linda 3.2.6.
My SIM computer consists of: Intel Core i&-9700K, Windows 10 and a graphics card Gigabute Geforce GTX 1080, 11 GB
My question: The first time flying with this new configuration, my Combo II display alternated the desired speed, altitude and direction with the current speed, altitude and direction. Since that one time, this changing information no longer comes into view except