killer-m got a reaction from Rose in Monkey Island 2 SE low FPS bug?
To disable FPS limiter, open Monkey2.exe in HEX-editor
Find and replace these bytes:
76 05 0F 57 C0 EB 06 → 89 C0 0F 57 C0 EB 06
The Steam version Monkey2.exe may need to be unpacked using Steamless
Vsync should be ON or you need to use external FPS limiter to limit FPS below 1000, otherwise the game may fail to startup.