Xeon
The first Xeon-branded processor was the Pentium II Xeon (code-named "Drake"). It was released in 1998, replacing the Pentium Pro in Intel's server lineup. The Pentium II Xeon was a ""Deschutes"" Pentium II (and shared the same product code: 80523) with a full-speed 512 kB, 1 MB, or 2 MB L2 cache. The L2 cache was implemented with custom 512 kB SRAMs developed by Intel. The number of SRAMs depended on the amount of cache. A 512 kB configuration required one SRAM, a 1 MB configuration: two SRAMs, and a 2 MB configuration: four SRAMs on both sides of the PCB. Each SRAM was a 12.90 mm by 17.23 mm (222.21 mm²) die fabricated in a 0.35 µm four-layer metal CMOS process and packaged in a cavity-down wire-bonded land grid array (LGA). The additional cache required a larger module and thus the Pentium II Xeon used a larger slot, Slot 2. It was supported by the 440GX dual-processor workstation chipset and the 450NX quad- or octo-processor chipset.
Pleiades (supercomputer)
In late 2014, more Westmere nodes were removed to make room for new Intel Xeon Haswell processors, increasing the theoretical processing power by one petaflop to 4.49 petaflops. In January 2015, additional Haswell nodes were installed and released to users, giving Pleiades a new peak theoretical processing capacity of 5.35 petaflops. An upgrade, completed in June 2016, replaced all remaining racks containing nodes with six-core Intel Xeon X5670 (Westmere) processors with racks containing nodes using 14-core Intel Xeon E5-2680v4 (Broadwell) processors. This improved the theoretical peak performance to 7.25 petaflops.