Crucial 8gb kit 2 x 4gb ddr4 2133 ecc rdimm memory kit product specifications brand crucial form factor rdimm total capacity 8gb kit 2 x 4gb warranty limited lifetime specs ddr4 pc4 17000 bull cl15 bull single ranked bull x8 based bull registered bull ecc bull ddr4 2133 bull 12v bull series crucial ecc ecc module qty 1 speed 2133 mts tracer false voltage 12v dimm type registered component configur