I may not be sufficiently computer literate to pontificate..... but the box FS 2000 Pro comes in says you need: Pentium 166 or faster, 32MB RAM; 64 recommended, 420MB disc space; 500 recommended, Quad speed or higher CD-ROM drive, 16 bit VGA colour.(Among other things)
When run on a 800MHz, 128MB RAM, 20GHB system there are no apparent problems, even operating almost everything at once (Gear,flap,trim,power,pitching and rolling)The only suspicion is that sometimes the clock runs in two or three second jumps.
Normal handling never seems to upset any indications or iteration rate, but the handling in semi-upsets is a bit weird. Whether a limitation of the system or lack of computer power is not apparent. (Just stay in control.)