If you thought Haswell-E was something, wait til you get a load of the EP variant. This server-grade monster has up to 18 cores and 45MB of L3 cache, plus quad DDR4 memory channels and loads of high-speed I/O. We've taken a closer look at the new Xeon family and tested a dual-socket workstation loaded with the 10-core E5-2687W v3 derivative.