smoothly on a PC with 4GB of RAM is a balancing act between software optimization and hardware management. While 4GB meets the game's minimum requirements, it often leads to lag as the system exhausts physical memory and relies on much slower hard drive paging.

Lag.

1. [ ] Patched fifa15.exe with 4GB Patch.
2. [ ] Disabled SysMain & Windows Search.
3. [ ] Set Windows Visual Effects to "Best Performance."
4. [ ] Fixed Page File (4096MB – 8192MB).
5. [ ] In-game: 720p, Low rendering, MSAA off, Crowd Low.
6. [ ] Edited fifasetup.ini with grass/cloth/stadium lights off.
7. [ ] Killed Chrome/Discord/OneDrive.
8. [ ] Run MemReduct to clear standby RAM.
9. [ ] Set FIFA 15 process to High priority.
10. [ ] Disabled Fullscreen Optimizations.

For even more performance, you can manually edit the configuration file to disable hidden features.