Upgrading memory on a Dell

[Flash19]

I want to upgrade the memory on my Dell as it lags when I'm playing games but was wondering if there was any limit on the amount my system could support? I checked on Dell's website and they only offer up to 512MB modules which I already have two of, which suggests to me that it doesn't support (or at least they don't suggest) using anything higher. Also, they are always banging on about how important it is to buy components directly from them, but does it really matter?

 

[kimsland]

Dell Dimension 5100 (also please update your Profile mobo to this)

Memory:
http://support.dell.com/support/edocs/systems/dim5100/en/sm/specs1.htm#wp1097520

Maximum: 4Gb 400-MHz and 533-MHz DDR2 unbuffered SDRAM
(note Windows Xp 32bit can only see 3Gb)

No it doesn't matter where you buy your Ram, but in saying that, you should buy the exact same ram that is already fitted, to avoid conflicts.