With the Intel Xeon semiconductor creator Intel introduced in 1998 a processor series for servers and workstations on the market. These are based on the models of the current desktop processors. The first generation of Xeon processors based on the Pentium II and Pentium III series with the P6 microarchitecture, but differed by its own base and its own chipset. With the second generation, which was released in 2001 on the market and based on the NetBurst architecture of the Pentium 4, the CPU has changed from a single-core to a dual-core processor. In 3rd generation of Intel Xeon-based from 2004 on the core architecture, from the 4th generation (2009) on the Nehalem architecture and the 5th generation (2011) on the Sandy Bridge architecture. Currently (2016), the Intel Xeon based on the Haswell architecture. The line width of the micro-architecture has been reduced over the years to just 22nm. Depending on generation, the Xeon processors have cores between 2 and 6. Compared to the desktop processors, they also usually have a much larger cache and multiprocessing capability.