I'm currently trying to upgrade my RAM from 4 x 1 Gigabyte sticks at 533mhz to 2 x 2 Gigabyte sticks at 800mhz. My system manual for my Dell XPS 410 says that I can put in 512 MB and 1 Gig sticks with no mention of 2 Gig sticks. This is all DDR2. What I'd like to know is if the modules that hold the RAM sticks are really limited to 1 Gig each to where my system won't recognize that it's 2 Gigs, or if I should just go ahead and get 4 x 1 Gig sticks?