I can only guess this is for gaming. It's still barely there for UHD 4K gaming so this is a little overkill on RAM but good GPU for the nice 144Hz 2K gaming monitors.

There are so many compatible motherboards that I don't advise such today. I stick with best sellers and give the nod to gamers like we see at https://www.reddit.com/r/PCMasterRace/wiki/builds