Upgrade your PCs RAM by an additional 4GB with a twin pack of memory modules DDR3 Non-ECC memory modules PC3-10600 1333 M Hz 240-pin Dual In-line Memory Module DIMMCAS latency 9 cycles Voltage 1.5 V Delivered in anti-static packaging Upgrading the memory in your desktop PC is one the most cost effective ways to boost performance. Memory upgrades are quick & easy to install. Adding extra memory ensures that the operating system & applications run faster & smoother & is essential for applications such as gaming HD video & image editing graphic design multi-tasking & manipulating large amounts of data. Upgrading is also an easy way of extending the life of your system.