Kingston's HyperX Plug-and-Play (PnP) is designed to improve the performance of your Sandy Bridge notebook or DIY system. Increase speed without changing system settings — PnP is preset for maximum speeds and easy to install. 
It's compatible with Generation 2 Core i5 and i7 and also with the latest Intel Sandy Bridge P67 and Z68 chipset. 
Plus it's backwards compatible without the plug-and-play functionality.

HYPERX PNP 2GB PC3-12800 (1600MHZ) DUAL-CHANNELThese high performance memory modules have been tested to run at DDR3-1600 at a latency timing of 9-9-9 at 1.5V. 
Additional timing parameters are shown in the PnP Timing Parameters section.