Processor Performance Charts: SYSmark 2000
Here you have a complete performance chart of all current Intel processors. Even though the Celerons are the slowest processors, they still provide enough performance for almost all kind of standard applications. SYSmark results of 200 (with high end hardware or overclocked systems) may be quite cool, but you won't benefit from this when working on a presentation. Even a Pentium II 300 provides enough performance for the majority of such purposes.