Make sure you get a board with plenty of M.2 slots and SATA connectors, into which you can plug SSDs and hard drives.
Motherboard: Just as the CPU determines which motherboards you can use, the motherboard determines… quite a lot, actually. Want loads of storage? Make sure you get a board with plenty of M.2 slots and SATA connectors, into which you can plug SSDs and hard drives. Want to add an RGB lighting kit? Look for mobos with 5V and 12V RGB headers. Most importantly, you should check whether the motherboard supports DDR4 or DDR5 RAM: you can’t put DDR4 RAM into a DDR5 slot, and vice-versa, so you’ll have to match the motherboard to the type of memory that you buy.