In the process of upgrading my Dimension 8200. Ram, Graphics and hard drive. Well the ram I ordered was non-ECC. The ram I removed from the puter is ECC. Before it even boots I get a message that the ram is not recognized. I was under the impression that I could change from one to the other if I changed all four. I saw on a puter forum that the BIOS needed to be changed. Come on guys I do furniture not puters. Can any one help or steer me in the right direction? Thanks Reed