The most recent Atom used in laptops is from 2016 and it was hardly fast back then. Up until recently, there were separate brands for Celeron and Pentium processors. Intel has now bundled both of them ...
Intel unveiled the design of its Tejas processor in early 2003 ... TDP while being clocked at only 2.8GHz. By comparison, the 90nm Prescott-based Pentium 4 521 was set at the same frequency ...