Lenovo 46W0821 (GB) 8 GB Internal memory, Memory layout (modules x size) 1 x 8 GB, Internal memory type DDR4, Memory clock speed 2400 MHz, Component for PC/Server, CAS latency 17, 1.2 V Memory voltage. LENOVO 46W0821 8gb (1x8gb) 2400mhz Pc4-19200 288-pin Dimm Single Rank Ecc Registered Ddr4 Sdram Memory For Server.