Use computer memory finder tools by indicating the specifications of your system. The tools then scan their databases to list memory sticks that are compatible with your computer. Corsair, Crucial and Kingston offer memory finders. As of January 2016, DIMM and SODIMM are the two main categories of computer memory.
To use the memory finder by Corsair, first indicate the type of computer you have from the first drop-down list. Then, select your manufacturer, and indicate the exact model. Click Go to see memory sticks that your motherboard accepts.
Use the finder by Crucial by selecting the manufacturer, the product line and the model of your system. Then, click Find Upgrade to see memory options for your computer. If you do not know the exact model of your computer, you can use the system scanner tool on the website to find the specifications of your system.
To find compatible memory sticks using the memory finder by Kingston, first select the type of computer you have, and then indicate the manufacturer. Select a product line and an exact model to begin the search.
In general, desktop computers use DIMM, and laptops use SODIMM memory sticks. Whereas a DIMM stick is 133 millimeters long, a SODIMM stick is about 67 millimeters long. Either form can offer DDR, DD2, DDR3 and DDR4 memory. Once any of the three memory finders suggests certain products, check the memory type to make sure that your system is compatible with the suggestions. Although iMacs are desktop computers, some models actually use SODIMM memory.