Legit Reviews posted a review on the Gigabyte GA-X99-SOC Force LN2 Motherboard w/ Special LGA2011-v3 CPU Socket A quote from the article:

When we were at the Gigabyte IDF LN2 overclocking event we spotted that Hicookie was using the Gigabyte GA-X99-SOC Force LN2 motherboard, which hasn’t been announced just yet! Gigabyte has already released the Z97-SOC FORCE LN2 motherboard for socket LGA1150 processors, but this is a new board using the Intel X99 Express chipset that has been engineered specifically for the most hardcore overclockers that need a board that can handle LN2. This board is very interesting to use because it uses a non-standard CPU socket that has more pins in it for better overclocking.

 Gigabyte GA-X99-SOC Force LN2 Motherboard w/ Special LGA2011-v3 CPU Socket @ Legit Reviews