Intel Xeon E3-1271 v3 

The E7-8880L v3 is a low power version, relatively speaking, which will also contains eighteen cores that are clocked at 2.0 GHz.

The largest model is the E7-8890 v3, which contains eighteen cores fed by a total of 45MB in L3 cache.

If that is not enough cores, then you can pick up an eight-socket motherboard and load it up with multiple of these.

While Ivy Bridge-EX was available with up to 15 physical cores per processor, double that with HyperThreading, Haswell-EX is increasing that to 18, or 36 simultaneous threads with HyperThreading.

The previous Ivy Bridge-EX flagship had 4.31 Billion transistors configured on a 541mm2 so its easy to tell that the Haswell-EP takes die size and transistor count to a new level.

The Xeon E5-2600 V3 lineup is going to be aimed at the HPC server and workstation market featuring 23 E5-2600 V3 SKUs including the flagship Xeon E5-2699 V3 which boasts 18 Cores, 36 threads, 45 MB of L3 cache and a high price of $4115 US.

That said the Xeon doesn't fall too far behind in many tests and at $250 it is less expensive to slap into a Z87 motherboard and it will reduce your power bill somewhat.

It is a Haswell chip running at a peak speed of 1.8GHz which would be great for a small business or for a home server.