In short, 204-pin small outline dual inline memory modules (SODIMMs) are the form factor used to provide DDR3L memory modules for notebook computers and other small form factor computing platforms. 204-pin SODIMMs are currently available in PC3-8500 (DDR3L 1066MHz) and PC3-10600 (DDR3L 1333MHz) speeds. To use DDR3L memory, your system must have both a 204-pin SODIMM slot and a chipset that supports DDR3L memory. A DDR3L SODIMM will not fit into DDR2 or DDR memory sockets - information about which memory technology your system uses is included in the Crucial Memory Advisor tool. SODIMMs are smaller and thinner than regular DIMMs and the 204-pin SODIMM PCBs are always around 2.6 inches long and are usually around 1.18 inches high. They consist of a number of memory components that are attached to a printed circuit board. The number of memory components on a 204-pin SODIMM"s printed circuit board (PCB) can vary, but the PCB will always have 102 pins on the front and the back both, for a total of 204 pins. The gold pins on the bottom of the SODIMM provide the connection between the memory module and the memory socket.
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