In 1998 Intel started including the name “Xeon” to label their processors targeted to the server and workstation market. These processors can access more RAM memory, can work on a multi-processing environment (i.e., motherboards with more than one CPU installed) and have a performance higher than their counterpart targeted to the end-user market.

The server and workstation versions of Pentium II and Pentium III were called Pentium II Xeon and Pentium III Xeon, respectively. So, while Pentium II and Pentium III were targeted to end users, Pentium II Xeon and Pentium III Xeon were targeted to servers and workstations.

With Pentium 4, Intel decided to call its server version as “Xeon” instead of “Pentium 4 Xeon.”

In the table below you can see the Intel CPUs targeted to end users and their counterparts targeted to the server and workstation market.

End-User Market Server and Workstation Market
Pentium II Pentium II Xeon
Pentium III Pentium III Xeon
Pentium 4 XeonXeon MPXeon 50xxXeon 70xxXeon 71xx
Core 2 Duo Xeon 30xxXeon 31xxXeon 32xxXeon 33xxXeon 51xxXeon 52xxXeon 53xxXeon 54xxXeon 72xxXeon 73xx

In this tutorial we will present the main technical features of all Xeon models released to date (Pentium II Xeon, Pentium III Xeon, Xeon and Xeon MP).


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.