Ron:
CPU-z says 1,2,3 & 4 and dual under Channel #. This is beyond my computer literacy, but would Dell have sold me the system with a memory configuration (dual) that didn't take advantage of the system's capabilities (tri)?
It would seem that the smart thing would be to buy 3x4GB for 1,3,5 and move 3x2GB to 2,4,6. If that's insufficient I can then buy 3 more 4GB. If you care to comment, I'd be interested to know if you agree, but you've devoted enough time to me already so I understand if you care not to.
Thanks again.
Alan