OWC now offers DDR3 memory upgrade kits for the new 2009 Mac mini models, with available capacities up to 4GB. The company claims to offer a savings of over 50 percent from the factory-installed modules. Customers can add a single 2GB module to an existing 1GB factory chip, totaling 3GB of DDR3 memory, or purchase a kit with two 2GB modules for 4GB of RAM.