Xaltar :
IAMACOW, JASONELMORE was talking about the socket 2011 Xeons, socket 1151 does not support more than 4 core CPUs 😉
As for socket 1151 Xeons, ASRock's Fatal1ty E3V5 Performance Gaming/OC works brilliantly. I managed to clock my 6600k (may as well be locked on a non Z board) to 4.5ghz without breaking a sweat using the BCLK OC.
Right, we seem to have a little confusion.
@Jasonelmore: There wouldn't be much point on the 8-core Xeon processors for socket 2011-3, as all of those motherboards use the X99 chipset and can OC already.
@iamcow: You are correct, you cannot use Xeon processors with any Z170, Q170, Q150, H170, H110 or B150 chipsets, which is rather limiting. But, as Xaitar pointed out, there is the iAsrock Fatal1ty E3V5 Performance Gaming/OC motherboard. It was technically part of the previous OC family mentioned in the article that was cancelled, but Asrock ended up shipping this one board anyway. It uses the C232 chipset, which is also sort of limiting, but it does let you BCLK OC the LGA1151 socket Xeon CPUs. I probably should have included a reference to it in this article, but here is a link to an older piece I wrote about that board.
http://www.tomshardware.com/news/asrock-non-z170-bclk-overclocking-motherboards,31362.html
@Xaitar: Awesome you got one of those boards. I'd honestly love to have one to play with, but I don't review motherboards and I don't have any need to build a new system right now, so I haven't got to yet. Although, I am somewhat surprised you didn't go for an LGA 1151 Xeon. Slightly higher cost, but you would end up with essentially a less expensive Core i7, and probably hit the same clock speeds. Still, glad you are keeping up. I think most people don't realize what that board can do.