Well, I was going to give you a "good answer" but now I am not so sure.
The processor spec sheet confirms the Ark posting.
http://download.intel.com/design/processor/datashts/320765.pdf page 12 lists the processor memory support.
Possably the Lenovo laptop supports more than just this processor so it has additional slots for 4 DIMMS?
Or they have some slick new 4-GB device technologies (never heard of them, but I don't keep up with laptop improvements )
I would recommend asking Lenovo. They may know something I don't.
Checked Cruicial site and they say 2 slots. http://www.crucial.com/store/listparts.aspx?model=ThinkPad%20W700ds%20Series
(Based on this specification I don't see how they could used 4 DIMMS with this processor.)
Message was edited by: Doc_SilverCreek
posted your reply in the thread at the Lenovo forum.
Hope to find a final answer soonand post the result here as well.