8GB STICK For Asus P9 Motherboard Series P9X79 P9X79 Deluxe P9X79 Pro P9X79 WS (Non-ECC) P9X79-E WS (Non-ECC). DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine A-Tech Brand. 8GB STICK DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Asus P9 Motherboard Series. (See Compatibility List Below)