how fast is a amd a8
I would say that an A8-4500 running at 2.8GHz would be about equal to an Intel mobile CPU running at 2.2GHz - 2.3GHz, but that's a rough estimate. Individual tasks can vary though. The A8-4500 is a quad core CPU while most mobile Intel CPUs that would compete with the A8-4500 on price would be dual core CPUs.