A computer's CPU accesses information stored in RAM through circuitry on the computer's motherboard . Also make sure that the type of RAM you get matches your computer. You'll need to find new EDO chips to match existing memory.
Most desktop computers have at least two banks.
If you're adding more than one RAM module to the same bank, make sure that both of the modules work at the same speed, which is measured in nanoseconds . Two modules sharing the same bank can cause problems if they have different speeds. Laptop computers typically have only one RAM expansion port. RAM designs vary widely among laptop manufacturers, so make sure you're buying the right kind of RAM for your system. Some operating system software includes virtual memory.