As far as I can tell from the docs, the au series takes ECC SDRAM in pairs. Are there any restrictions on chip count, timing, registered / unregistered, etc? Specifically, will Crucial part no. CT32M72S4R8E work? http://www.crucial.com/uk/store/PartSpecs.asp?imodule=CT32M72S4R8E DES -- Dag-Erling Smørgrav - des at des.no