As of August, 2014, DDR4 SDRAM is a modern emerging type of dynamic random access memory (DRAM) with a high-bandwidth ('double data rate') interface, and has been in use since 2013. 288-pin DIMM, used for DDR4 SDRAM and DDR5 SDRAM ĭDR, DDR2, DDR3, DDR4 and DDR5 all have different pin counts and/or different notch positions.278-pin DIMM, used for HP high density SDRAM.260-pin SO-DIMM, with different notch position than on DDR4 SO-DIMMs, used for UniDIMMs that can carry either DDR3 or DDR4 SDRAM.240-pin DIMM, used for DDR2 SDRAM, DDR3 SDRAM and FB-DIMM DRAM.
