It makes sense if you have a 32-bit operating system! If it's 64-bit, there will be no effect!
This utility allows you to allocate not 2 GB as usual, but 4 GB of RAM for the game. Naturally, this positively affects performance and gameplay comfort! Especially if you play on a map with many third-party objects where you need to load lots of textures and objects!
Installation is simple.
1. Download
2. Unpack the archive.
3. Run "4gb patch.exe" as administrator and in the window that appears, specify the path to the game's exe file.
4. Select it and click "Open" — a window will pop up confirming the successful patching procedure.
Close it, launch the game, and enjoy smooth gameplay!
Source:
spintires.nl