Well if you're memory can handle the more aggressive timings, youre system should respond faster although what I noticed is memory at a higher FSB seems to perform better than memory at a more aggressive timing. That said, aggressive timings are great for lowering latency (which is really what it does) so it does make ur system feel faster (supposedly anyways, but if you're screaming away at 400mhz FSB w/ 3338 vs 2225, dun think you'll notice too much difference).