Hello, everyone.
My experience with TSC DX12 Experimental is negative so far. On my Ryzen 5 5600X system, 16 GB RAM and Nvidia 3070 RTX, I averaged 80 fps on the original DX that runs "Railworks64.exe" (probably DX9) at 3440*1440 resolution. After using DX12, under the same conditions, fps dropped to a maximum of 40 fps (minimum was even 12 fps when passing other trains). Trying with and without RWE 2 Pro.