I've got the same problem, using win 10 x64, with the exact same setup (mods, etc.) under linux (mint) i get no stutter at all.. thats just weird. never had stutter before 1.2, just the usual x32-problems with too less ram usable etc. Tried to run Memgraph, but it won't change anything with alt+ numpad-keys, so allways shows a full 8top to bottom) ram-usagegraph of 100% memory-usage. (at ~1gb, while my sys got 32gb.) and,strangely, i cant uncheck the "highlight fx"-button in ksp, all others work fine. disabling only AA has not fixed the stutter.