I debating which CPU i should get. The 7820X is $200 more for a octa core with a 3.6 base speed compared to the hex core 8700K 3.7 but has faster multi-core speeds. They both only support R4-2666 memory but he 8700K can only do 2 sticks while the 7820X can do 4. Then on top of that the 7820X needs a x299 board as opposed to a more "mainstream" z270 or z370. I honestly cant decide whether the extra cores and inter-core speeds are worth the cost.