technoguy

The 200-pin SO-DIMM has two variations for locating the notch that are nearly indistinguishable. If the notch is located further outboard, it indicates the DDR class of memory. When the notch is located towards the center of the board, it indicates DDR2. These two types of memory are not interchangeable and thus have slightly different notch locations that prevent cross installation. The PC2700 200-pin SO-DIMM depicted in the accompanying photograph shows a notch slightly outboard, and is thus DDR. Caution should be exercised when visually identifying 200-pin SO-DIMM modules