Product Detail 6GB Tri-Channel memory kit Rated 9-9-9-24 1600MHz, PC3-12800 Three 2GB DDR3 modules . The "G.Skill NQ Series F3-12800CL9T-6GBNQ Tri-Channel - Memory - 6 GB : 3 x 2 GB - DIMM 240-pin - DDR3 - 1600 MHz / PC3-12800 - CL9 - 1.5 - 1.6 V - unbuffered - non-ECC" is best product for you. We recommended G.Skill NQ Series F3-12800CL9T-6GBNQ Tri-Channel - Memory - 6 GB : 3 x 2 GB - DIMM 240-pin - DDR3 - 1600 MHz / PC3-12800 - CL9 - 1.5 - 1.6 V - unbuffered - non-ECC