p> Intel Atom 2700MUD motherboard? I'm having fits trying to get mine
p> working with 4 GB of RAM.

Currently, Atom 2700 chipset motherboards cannot use more than 2Gb -
it's a hardware limit. The 2800 chipset does...

liliputing.com/.../intel-atom-n2800-chips-may-support-up-to-4gb-of-ra\
m.html

...however there's no way you can upgrade the chipset on you current
board to get this 4Gb memory support !!