... besides the fact that the game was designed to run at 30fps... I do see a performance "hit", but I have never gone below 42fps with the mod, even when it was busy outside the boat, and I've got an old Core 2 Duo quad-core with 8gig of ram with an old 560Ti with what? 512k of RAM?? I don't know if it impacts the game when not viewing the interior, but I have not noticed any difference, though I do know of at least two people that do experience issues on their computers when it is loaded, but those problems might be from something else, like the base FotRSU mod, or their computers...