Skyrim updates frequently break SKSE-dependent mods. Because FSMP interacts directly with the game's memory and CPU instructions, even a minor game update renders older versions of the physics engine unusable. This fix is the bridge for players who have chosen to "freeze" their game at version 1.6.353 to maintain mod stability. Skyrim Script Extender (SKSE)
You must have the SKSE version corresponding to 1.6.353 (typically v2.1.5 ). You can verify your version by typing getskseversion in the game console. FSMP - Faster HDT-SMP 1.6.353 Fix
As part of the "Faster" HDT-SMP branch, this fix maintains optimized AVX/AVX2 instruction sets, which reduce the CPU overhead typically caused by complex physics calculations. Installation & Requirements Skyrim updates frequently break SKSE-dependent mods