DIMM – Dual Inline Memory Module. A double-sided hardware card loaded with DRAM chips that plugs into a socket on a computer motherboard and so connects to a CPU across a 64-bit bus. A prior SIMM (Single InLine Memory Module) used a 32-bit bus and the DIMM is therefore significantly faster. There are various types of DIMMs such as UDIMMs (unbuffered DIMMs), FB-DIMMs (fully-buffered DIMMs), RDIMMs (registered DIMMs), LRDIMMs (load-reduced DIMMs), SO-DIMMs (small outline DIMMs), MicroDIMMs, and UniDIMMs.

Netlist DDR4 DIMM.