Crucial Technology CT12872AB667S 1 GB 240-pin DIMM  DDR2 PC2-5300 CL=5 Registered ECC Single Ranked DDR2-667 1.8V 128Meg x 72 Memory<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>240-pin DIMM</li><li>DDR2-667</li><li>DDR2 PC2-5300 Registered， ECC， DDR2-667， 1.8V， 128Meg x 72</li><li>The only brand of memory upgrade available directly from a DRAM manufacturer， tested to meet the most stringent industry specifications</li><li>Install it yourself in about 15 minutes. The same top-quality memory that the worlds largest computer manufacturers install in the systems they sell</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41QO40mE0jL.jpg" noproxy>