Ran these for about 4 days so they are practically new. Run flawlessly in dual channel, but my BIOS limitations do not allow me to get them to 433MHz. Anyway, the link for more info is http://www.geilusa.com/proddetail.asp?linenumber=12 The product gets excellent reviews http://www.monster-hardware.com/modules.php?name=Reviews&rop=showcontent&id=22 Just listed them on E-Bay today individually, but if anyone is interested in the pair PM me. The price is $170 for the pair including shipping. Thanks!