For the sake of testing the 4Gb Patch posted by TheBerbster, I applied it and I can tell I donīt see any change in FPS or lags or stutterings applying this patch in TWoS.
I don't have a super PC, and with or without the patch, I can mantain more than 60 FPS with full graphics and max. in-game AA.
I use a fixed 35 FPS via Nvidia Inspector generally, then I havenīt any lags or stutterings. All works fine with or without the patch.
Happy New Year!
Fitzcarraldo