dyna-ti":p12tclzf said:In case it hasnt been mentioned but a 32 bit system will only handle 3 GB of ram,above that needs a 64 bit
32-bit systems really struggle with larger amounts of memory like this (even accepting PAE).
On a user desktop PC, the 3GB switch can make a difference, though. The normal 2GB / 2GB for user / system usage, when upped to 3GB in favour of user programs can be of some use - as always it depends.
If you've got a memory heavy program that wants to use above 2, and you use it that way, using 3GB switch can be most useful. In other scenarios it's normally a balancing act between doing that, and taking the hit on PTEs.
As a generalism, though, for a normal desktop PC, if you've got 4GB RAM installed, it's unlikely for Windows to be able to use all of it (you'll likely see a loss, for the reasons descibed in the page linked. And if you use very memory intensive apps, that may well like to go above 2GB, and your machine doesn't run oddles of processes or other things (so really, one big monolithic app that really digs memory) then the 3GB switch can be useful.