G. Skill DDR3 Ripjaws X Series for the Intel Sandy Bridge platform. PC3-10666 1333 M Hz with timings of 9-9-9-24 (CL9). 1.5V dual channel kit, 2 x 4GB modules, 240 pins & equipped with new style red Ripjaws X Series heatsinks. G. Skill has announced the development of its brand new Ripjaws X series memory modules, designed specifically for Intel Sandy Bridge LGA1155 processors, & H67 & P67 motherboard platforms. Combined with the Intels highly anticipated Sandy Bridge platform, G. Skill Ripjaws X series memory kits deliver more bandwidth & performance than ever. Pre-tested in the following motherboards, but may also be suitable for other motherboards. ASUS Maximus IV Extreme ASUS P8P67 DELUXE Gigabyte GA-P67A-UD5 Gigabyte GA-P67A-UD7 MSI P67A-GD50 MSI P67A-GD55 ASRock P67 Extreme 4 ASRock P67 Extreme 6 Biostar TP67XE ECS P67H2-A Please refer to the G. Skill website for up to date compatibility listings.