List of Intel Xeon chipsets
Around the time that the Pentium 4 processor was introduced, Intel's Xeon line diverged from its line of desktop processors, which at the time was using the Pentium branding. The divergence was implemented by using different sockets; since then, the sockets for Xeon chips have tended to remain constant across several generations of implementation.
Source: Wikipedia — List of Intel Xeon chipsets (CC BY-SA 4.0)