1333 MHz DDR3-1333/PC3-10600 - Non-ECC - Unbuffered - 240-pin DIMM. When you buy Crucial memory, you're buying directly from the largest DRAM manufacturer in America and one of the top three in the world. Crucial Technology is a division of Micron, a multi - billion-dollar company with 19,000 employees worldwide at facilities in Idaho, Texas, Italy, UK, Singapore, and Japan. We have more than 20 years of industry experience and are the lowest-cost, most efficient DRAM manufacturer, and many of the world's leading computer manufacturers use our memory. Crucial brings that same high-quality memory directly to you, the end consumer. CT2KIT51264BA1339 More details...