GeeCoolGuest
GeeCoolThe 9980XE needs an X299 board: LGA2066, quad-channel DDR4-2666. New boards are long gone and used inventory is thin; many boards need a BIOS update to support the 9000-series parts — confirm before buying.
Avoid entry-level boards; this CPU draws real power under load. Fill all four memory channels; two sticks cut bandwidth and drag multi-core performance down.