The IBM ThinkCentre family of computers includes dozens of models ranging from the ThinkCentre M77 to the ThinkCentre S51. The desktop computers can accommodate a wide range of memory amounts, with some models holding up to 16 GB. Because of the wide range of options and capabilities, Memory America stocks a variety of replacement memory to choose from. Select a small memory chip to simply repair a system, or opt for a larger amount of memory to perform a quick and easy upgrade. More memory allows the computer to run faster and more efficiently.