Xeon
Introduced in May 2013, Xeon E3-12xx v3 is the first Xeon series based on the Haswell microarchitecture. It uses the new LGA 1150 socket, which was introduced with the desktop Core i5/i7 Haswell processors, incompatible with the LGA 1155 that was used in Xeon E3 and E3 v2. As before, the main difference between the desktop and server versions is added support for ECC memory in the Xeon-branded parts. The main benefit of the new microarchitecture is better power efficiency.
Cheyenne (supercomputer)
Cheyenne is an SGI ICE XA system with 4,032 dual-socket scientific computation nodes running 18-core 2.3-GHz Intel Xeon E5-2697v4 processors with 203 [now 315] terabytes of memory. Interconnecting these nodes is a Mellanox EDR InfiniBand network with 9-D enhanced hypercube topology that performs with a latency of only 0.5 microsecond. Cheyenne runs the SUSE Linux Enterprise Server 12 SP1 operating system.