I think a couple notebook companies are putting desktop motherboards in their notebooks. Thus, they are able to use a 2.2GHz P4. The 2.2GHz would obviously perform better, but I think the P4-M 1.6GHz would be a much better option. The mobile CPUs have some extra instructions in them to help conserve battery life. Trust me, it may not concern you now, but battery life is a very very important decision when buying a notebook. I would pair that with a Radeon Mobility 7500 for a very good gaming performer + good battery life.