Corsair CMP4GX3M2A1600C9 4GB (2× XMS3 2GB) PC3–12800 (1600MHz) DDR3 RAM, 2×240-pin DIMMs, Non ECC, Unbuffered, 9–9–9–24, DOMINATOR Technology , Intel Core i7, i5, i3, Core 2 / AMD Phenom II, Includes new connector for future upgrades and accessories, Lifetime Warranty