The G. Skill Ripjaws X Series 4GB memory modules are high-performance DDR3 SDRAM DIMMs designed for computers that require fast and reliable memory. With a total capacity of 16GB spread across two modules, each with a capacity of 4GB, these memory modules are perfect for demanding applications like gaming, multimedia editing, and multitasking. The Ripjaws X Series also features a lifetime manufacturer warranty, ensuring that you'll have peace of mind knowing that your memory modules are covered for as long as you own them. Upgrade your computer with the G. Skill Ripjaws X Series for improved speed and efficiency.