unless you have software that support the FPU, then it is absolutelly not needed... as for games I have heared of only one flight-sim that uses the fpu... if u still want one perhaps u should check amigakit.com, or ebay, or PM CatHerder on this forum and ask him if he has one... when I accidentally burned my 68882 by putting it in the wrong way, I got a replacement from him at a very good price :-) not that I have any use for the fpu, but I just wanted one....
