WinXP here, with 512MB RAM and a GeForce FX5600 128MB card, it's a Pentium 4 2.81GHz, if I recall correctly. It works perfect, haven't tried Premium effects yet, but it works. The only time the game paused and asked me if I wanted to lower the quality was in Fury of the Storm, but I didn't notice any considerable decrease in speed and stuff [since i didn't want to lower the quality and all]
Yeah. This is great since it doesn't need much to run, unlike most games nowadays.