P3D V4.5 Heavy performance impact with Orbx Germany South / North in PREPAR3D® V4.x Support Forum Posted April 14, 2019 · Edited April 14, 2019 by Vali Rusu It seems that the ORBX fps loss is constant as it was and the issue comes from the P3D itself (at least from the measurements done by Rob). On my side, as I was with fps locked at 30 and I deactivated the ORBX Germany, the fps clearly went up from 16 fps to 30fps. So I could not see the default fps loss. Anyway, the ORBX fps loss is still considerable too (around 15fps..), perhaps they can also improve it. But in the end, the initial drop comes from LM it seems. Lets see what will come up from LM and ORBX on this.