When you're looking for a motherboard for your Core i7 5820k, you'll want to make sure that it best supports your current generation of processor. This is important because older generations of Intel processors don't support the latest technologies. For example, the latest generation of Intel processors support Intel AVX, which was first introduced in the 2011-2012 generation of processors. This means that the newest motherboard you buy must support Intel AVX. Here is a table to help you figure out which generation your Core i7 5820k is.