You need to identify the CPU before you can select a motherboard. The CPU and the motherboard have to be compatible. For a 12 core CPU, the 2920x offers a very good value, but that platform cost are high.
AMD's 2700x is an 8 core/16 thread CPU that will do very well at rendering and gaming and will be a much cheaper platform. So unless you have to have the extra 4 cores, I would consider the 2700x.