Corsair Dominator GT 4 GB PC3-12800 1600MHz 240-pin Dual Channel Core i3, i5, i7 DDR3 CAS 6 Memory Kit CMT4GX3M2A1600C6 Ultra-high performance 4GB DOMINATOR GT kit for Intel Core i3, i5, i7 Dual Channel processors. 1600MHz, 6-6-6-20, 1.65V, with Intel XMP. Includes Corsair Airflow Fan. Two matched 2GB modules for use in high performance Intel Core i3, i5, i7 Dual Channel systems Intel XMP (Extreme Memory Profile) Support Backed by Corsair: A respected name with a passion for quality products, and great service and support.