Before you can even buy RAM for your system, you need to know what kind to get. Your computer may differ from this picture, most noticably in placement, colorization, and type of processor socket (Many older computers use slot-type processors, which will probably be large and rectangular, and are usually black.) If not, you can tell what kind of RAM you are using by the size, shape, and number of sections that the edge that contacts the RAM slot is divided into. (Note: If you have a computer of less than 300 megahertz, and/or your RAM is mounted diagonally, your computer is most likely using SIMMs, an extremely elderly and outdated type of RAM. Although some computer stores which carry used parts may have SIMMs, they are no longer manufactured, and thus are often difficult to find and/or pricey. Also, most systems with SIMM RAM require that you have two sticks of the same type and amount of RAM, forcing you to buy RAM in pairs. The exception to this rule is Advanced Micro-designs (AMD))

Here is some info on inserting RAM.

Now, locate the RAM slots on your computer. Generally, there are from 1-6 RAM slots, with 3 and 4 being the most common numbers. Now, look closely at the RAM slot: On either side of the chip, there will be a release of some sort, most of which can be released by pulling them in the direction opposite to the middle of the chip. (Note: Before doing anything inside the computer, either use an anti-static wristband, or touch the metal of the case to dischare any static electricity you may be carrying. Static electricity can damage RAM.) Once you have opened the two releases, you should be able to remove the chip without much trouble.

Now, look at the chip. The bottom should have several rows of gold or silver covered squares, located where the chip contacts the inside of the slot. If it is divided into three sections, in order from smallest to largest, your RAM is SDRAM. If it is divided into two sections, your RAM is DDR. Finally, if it is divided into three sections in an order consisting of large, small, large, then your RAM is RDRAM. RDRAM is rare, and, like SIMMs, must be used in matched pairs.

You also then have to find out what speed your RAM is. This is not as critical as most motherboards automatically detect the speed of RAM and adjust for it. If fact, at this point in time, as long as you get the right type of RAM, you should be able to use it in your system. However, to prevent excess expenditure, we recommend finding the maximum clock speed, which may be found by contacting the manufacturer, researching online, or having a professional run tests.

Once you have purchased the RAM you intend to add to the computer, simply line it up with the RAM slot, making sure to face it in the correct direction, and apply pressure to both ends until the chip snaps into place. Start up the computer, and your system should detect your new RAM automatically.