Turn on frame skip and you should see Model 2 get smoother.
You must mean 2 gigs of RAM, 2 megs and youd be stuck with Windows 95. All well and good to look at CPU speed, but it offers no indication of performance. If its a 2.4GHz Celeron itll still be gutless, to quantify that statement if you took an i7 920 at 2.66 GHz its about 50 times more powerful than a 3.2GHz Pentium 4, so its abit more important to state the CPU type, since the speed really means less than nothing if you dont know what design it is.