1. Overview The FNV 4GB Patcher is a small, community-created utility for Fallout: New Vegas (FNV). Its primary function is to modify the game’s executable ( FalloutNV.exe ) to allow the game to access up to 4GB of RAM (or more on 64-bit systems) instead of the default 2GB limit.
Always use the patcher—preferably the version bundled with NVSE or the standalone patcher from Nexus Mods. Do not confuse it with “heap replacers” (e.g., NVHR) which solve different memory issues. Fnv 8gb Patch