4GB is the max for the 1600SC. Also none of the Dell servers support using NON-ECC dimms. As far as using it for a workstation, it is possible. The issues you will have is loading a Workstation OS on a server, as they are not officially supported, but you can generally use the Windows Server 2003 drivers for loading XP/Vista and then 2008 for Win 7. Let me know how it goes.
Is the ram in this machine really only upgradable to 4 gig? Why so little. The machine seems like such a powerhouse. I know that it is ECC. So can I add NON-ECC memory and put more in it? This machine was given to me. And don't need to use it as a server. I was just wanting to use it as a regular computer. Or should I just sell it to someone who needs a server?
Dell poweredge 1600sc memory upgrade