The Xeon E7-8800 / 4800 v3 product families are based on the Haswell-EX CPU core but come with shedloads of enhancements and more cores. The E7-8800 series processors, for example, are packing up to 18 cores.
The Xeon E7-8800 / 4800 v3 product families are a “tock”. Older Xeon E7 v2 processors were based on the Ivy Bridge-EX core. The new E7 v3 parts are based on Haswell-EX, but both use Intel’s 22nm process node. Next generation Broadwell-EX based Xeons will be 14nm.
The chips are for mission critical workloads and big-data analytics applications. The processors have 20 percent more last level cache (LLC) as well, while remaining pin pin compatible with the E7 v2 series.
Xeon E7-8800 / 4800 v3 series processors have 32-lanes of PCIe 3.0 connectivity per socket, TSX is enabled in all SKUs, they support DDR3 and DDR4 memory. They can use up to 6TB of memory in a 4-socket configuration or 12TB in an 8-socket setup.
QPI speeds are up to 9.6GT/s and can manage features like address mirroring and rank sparing. In the past when using address range memory mirroring to protect data.