These ram can be used to replace the 4116's on Williams boards for those who dont want the 4116's anymore. I still have the 4116 for sale as well. You will need to mod the board but it will use only one voltage then and some folks like that, the mod is here, please do this at your own risk. http://osborn.tech.officelive.com/documents/JustSayNoTo4116.html