My previous email did not display the data properly – to rehash: Try downloading freeware Belarc Advisor (Belarc.com) and see what it shows. On my desktop, I get this from Belarc Advisor: Memory Modules 3292 Megabytes Usable Installed Memory Slot ‘DIMM_1’ has 2048 MB (serial number 96C4476A) Slot ‘DIMM_2’ has 2048 MB (serial number 96C44768) At least you can tell if the memory is being recognized for what it is or not. Belarc advisor gives a lot of info about your computer as well, components, software versions, etc. Paul Hachmeyer PCSOFT's List Owners: Bob Wright<[log in to unmask]> Mark Rode<[log in to unmask]>