CT6472Y40B - Crucial 512MB DDR-400MHz PC3200 ECC Registered CL3 184-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, 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.