If you pay close attention, you will find some stores selling “Celeron Centrino” notebooks. There is just one detail: Celeron Centrino does not exist.

In order to be called Centrino, a notebook must have three components: Pentium M processor, Intel 915 or 855 chipset and Intel/PRO wireless LAN. You can see this at So, notebooks based on Celeron M cannot be called Centrino because they are not based on the Pentium M CPU. Even notebooks based on Pentium M that don’t have Intel/PRO wireless LAN or Intel 915 or 855 chipset cannot be called Centrino.

The differences between Pentium M and Celeron M are basically the external clock rate and the amount of memory cache:

At first calling Celeron M as Centrino wouldn’t be a problem. However, this causes certain confusion on the market. A “1.6 GHz Centrino” is faster than a 1.6 GHz Celeron M, since a Pentium M is faster than a Celeron M running at the same clock rate. The problem is the user buying a 1.6 GHz “Celeron M Centrino” thinking that it will achieve the same performance of a “real” 1.6 GHz Centrino, which won’t happen.

Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.