I currently have 2x4GB G Skill DDR3 1600Mhz PC3-12800 CL8 in my Asus P8P67 PRO L1155. I've happened across a single stick of 4GB G Skill DDR3 1600Mhz PC3-12800 CL7. I also have an i5-2500k if that matters. I'm wondering if it won't even be worth seeing if adding the 3rd stick of ram will work...