Fresh install of the latest version of KSP (1.11.2.3077). My hardware should be OK (ASUS ROG G72 laptop, i7 processor, 16GB RAM, GeForce GTX 1070 video)
I'm running a crap-ton of mods (134 total)... load time is long, but it otherwise runs pretty smoothly.
You are correct, Gameslinx, I'm using OpenGL. I'll switch to DX11 and test run it. Back shortly...