CT6472AB53E - Crucial 512MB DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM Memory Module

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. 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.