Corsair Memory 4GB Single Module 1333MHz CL 9-9-9-24 1.5V DDR3 DIMM for Intel and AMD platform system builds and upgrades. Corsair built its reputation on performance memory that shines in the most demanding computing situations: extreme gaming and high-transaction processing environments. But not all computers are put to such extreme usage. So we brought the same reliability, testing and Corsair quality to a line of memory designed to support standard computing situations such as popular office applications. Now its one of our most popular memory lines. Backed with a lifetime warranty, it is memory you can rely on.