"Ditto" to what KaleunMarco says, but I want to mention that the game itself also has a "bandwidth" problem, and if you think about it, as I mentioned just now over in the SH3 forums, at 512x TC, one second of your life passing in front of you at the computer is over eight and a half minutes in game time. A LOT can happen in 8 and a half minutes, like your sub getting holed by a bomb from an airplane, or a shore installation. You will probably find though, that 256x TC near ports is necessary, no matter how strong of a computer you have. It is, after all, an old game...