Corsair XMS3 8 GB (2 x 4GB) 1333 MHz PC3-10666 240-Pin DDR3 Memory Kit 1.5V Two matched 4 GB modules for use in high performance for the AMD Phenom II or Intel Core i7, i5 and i3 Dual Channel systems Outrageously fast 1333 MHz performance using 8 GB of memory with 9-9-9-24 latency at 1.5v Includes new connector for future upgrades and accessories Intel XMP (Extreme Memory Profile) Support Backed by Corsairs Lifetime Warranty and excellent customer support. Please refer the User Guide before use.