In short 204 pin small outline dual inline memory modules sodimms are the form factor used to provide ddr3 memory modules for notebook computers and other small form factor computing platforms 204 pin sodimms are currently available in pc3 8500 ddr3 1066mhz and pc3 10600 ddr3 1333mhz speeds to use ddr3 memory your system must have both a 204 pin sodimm slot and a chipset that supports ddr3 memory a ddr3 sodimm will not fit into ddr2 or ddr memory sockets sodimms are smaller and