A comparison between DIMM and SODIMM
Computer memories are built normally using integrated circuits one such type is the SODIMM (small outline dual in-line memory module). These are just a kind of alternatives to DIMM. They are more or less equal in power to the DIMMs. They are mainly used for systems which need smaller memory capacity and have storage capacity restrictions. Notebooks, small footprint PC’s, networking hardware and high-end upgradeable printers, use them. The speed of this is analyzed by the clock speed like 400 – 800 MHz usually.
They consist of specific pins that have individual package support. 72 and 100-pin packages can be used for 32-bit data transfer. 144, 200 and 204-pins have 64-bit data transfer. Like the DIMM’s, SO-DIMM’s also have distinct notches, by which they can be attached to different appliances. 144 and 200-pin SO-DIMMs have a single notch and two notches are found in 100-pin modules.
The position of the notch in the module is the thing that matters. In case of 200-pin SO-DIMM if the single notch is located near the centre board then the memory is of DDR2 (double data rate) type, where as if it is far from the centre it uses DDR class of memory. By this way any wrong installation can be averted. The different package support in the SO-DIMM makes it very effective though they are small when compared to other modules. New improvements have been made now like the 204-pin SODIMM with PC3-6400, PC3-10600 and PC3-12800 specifications.
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