I honestly don't "know", but it's uninstallable, you can turn it on and off, it's free, so what's to lose? As you know, RO caps the FPS online at 85 FPS (I think), so to test this program you would need to either try it in offline mode, or try it with another game perhaps. I used to have an old P4 with 1.5 GB RAM, I wonder if this program would have helped? Let me know what you think. TWB*SlowBull