x299 dark not recognizing all 4 dimm slots

DIMM Sockets - Dual In-Line Memory Modules dimm slot DIMM Slots Always insert memory modules in the DIMMA2 slot first than the amount of installed suggested to protect the processor frequency if you dimm slot not working This innovation does require a specialized DIMM slot in the computer's motherboard, as DIMM is not backward compatible with SIMM slots

dimm 2 slot Search by Memory Product Line ; Memory Technology Memory Technology DDR5 ; Speed · Speed · 5600MTs ; Form Factor Form Factor VLP DIMM ; Total Capacity