Intel Xeon CPU is Intel’s server-grade chip, and it’s not cheap. They are as well-made as any other chip in Intel’s inventory. How cheap?
As you can see, the cost of the high-end Xeon is much higher than that of the high-end i7. While they provide nearly the same performance, Xeon is designed to use ECC memory, which is slower than standard memory. I read that the difference is 1-3%, on boards that support Xeon and i7, like the Asus X99 Deluxe, the Xeon beats the i7.
In some cases, Xeon chips are actually better suited for non-server purposes, such as content creation (especially video), where the i7’s single-threaded speed is not only unpopular, but also unpopular because of good video software performs better on multiple CPUs.