184 pin ddr sdramdimms 184 pin ddr dimms are designed for the latest desktops and servers each 184 pin dimm provides a 64 bit data path so they can be installed singly in 64 bit systems to use ddr memory your system motherboard must have 184 pin dimm slots and a ddr enabled chipset ddr sdram double data rate synchronous dram is a type of sdram that supports data transfers on both edges of each clock cycle effectively doubling the memory chips data throughput ebuyer offers pc 266 pc210