Details: Capacity - 2GB & 4GB Speed - DDR3 1600 - PC3-12800 Type - 204-pin SODIMM CAS Latency - 9 Maximizing your system memory is the most cost-effective and easy DIY installation solution. Dramatically improve application and system responsiveness, gaming and specific memory intensive usages such as video streaming over wireless networks. Avoid system slowdowns or bottlenecks by giving programs more memory to use. Every VisionTek memory module is built and tested to the JEDEC Standard to deliver assured speed and reliability.Productivity / Multi-Tasking More memory means more programs can be run at one time. Systems may slow when running a large amount of programs at once. By upgrading, you can eliminate slowdowns and bottlenecking, meaning your system can do more for you. Speed / Performance Every app and program you run uses memory, all of them conpeting for space. By upgrading your system memory, you provide more space for programs and apps to run, creating a better performing sys