GeeCoolGuest
GeeCoolThe 9960X runs the old X299 platform — board selection is about BIOS compatibility and VRMs. This 2018 CPU may not be recognized by factory BIOS versions on many used boards, so have the seller confirm; sustained multi-core loads demand decent VRM cooling.
Fill the four DDR4-2666 channels. No new boards exist, so evaluate used ones on their merits and don't invest heavily in this platform.