http://support.dell.com/support/edoc....htm#wp1102222

[align=left]Memory [/align] Memory module connector
two user-accessible SODIMM connectors
Memory module capacities
512 MB, 1 GB, 2 GB, 4 GB
Memory type
667 MHz SODIMM DDR2
Minimum memory
1 GB
Maximum memory
8 GB


System originally only allowed 4g max ram. Prolly came out before 4gig dimms were available, if you do upgrade, hit the website and update to the latest bios, I checked them all and did not see anything specific for increased memory support, but that's the first thing tech support will have you do.

There are 2 different motherboards for this system, but its not for system ram slots but for the video options offered.