The Celeron processor is designed to be Intel's most cost-effective processor. It is their most basic, and thus slowest. While a Celeron may have a similar GHz rating to a Core or Pentium processor, the Celeron will be slower due to smaller amounts of cache within the processor itself. We do not generally recommend purchasing a computer with a Celeron processor, because they offer by far the least in terms of longevity -- while a computer with a Celeron processor will be less expensive now, it will need to be replaced at a cumulatively higher cost later.Click here to read more about the Celeron from Intel.