Corsair CMG4GX3M2A1600C7 Dominator GT 4 GB (2 x 2 GB) PC3-12800 1600MHz 240-Pin DDR3 Core i7 and Core i5 Memory Kit Each memory module is individually tested to give you Peace of Mind that it Will Not Fail, Guaranteed! 4GB Dominator GT Memory Kit ( 2 x 2GB ) with Airflow Fan Included for use with Dual Channel DDR3 Intel Core i5 and Core i7 processors Perfect upgrade to Compliment Windows 7 and it's great for Gamers who want more speed out of their systems Lifetime Warranty Backed by Corsair  A respected name with a passion for great service and support 4GB 2 x 2GB PC3-12800 1600MHz 240-pin DDR3 Timing: 8-8-8-24 1.65v Memory Type: DDR3; Speed: 1600MHz