Older computers, particularly models manufactured before 2007, may require Long DIMM 240-pin DDR2 memory modules to perform as designed. As more new computers reach the marketplace, it has become more difficult to find DDR2 modules at retail stores. Fortunately, customers searching for DDR2 modules can rely on Memory America as their source for new modules that will perform just as well as, if not better than, the original memory modules on these systems. Our selection of DDR2 memory modules includes ECC-registered memory, fully buffered DIMMs and non-registered memory. DDR2 memory types include PC2-3200, PC2-4200, PC2-5300 and PC2-6400 modules. We have modules that can be installed in desktop computers and Apple products including Mac Pro and Xserve systems. All of our DDR2 modules are brand new and have been manufactured to meet or exceed OEM specifications. The best way to find the memory modules that are appropriate for you system is to enter the make or model number of your system into the search field on our site. After entering this information, you will be directed to the pages with the memory modules best suited for your system.