Xeon E3-1220 v3 is a server/workstation processor from Intel released on 2 June 2013, and it is in cpu.details.production-unknown now. It belongs to Xeon E3 family and has a Haswell-WS architecture. This processor is built on Intel Socket 1150, and uses Gen 3 PCI express connection. 22 nm process is used in production.
Processor has 4 cores and 4 threads, with the base frequency of 3.1 GHz. It has DDR3, DDR4 Dual-channel memory support. As for the cache, it supports L1 64K (per core), L2 256K (per core) and L3 8MB (shared).