I've recently decided it's time to replace my server's motherboard, I'm currently using an ASUS P5VD2-VM (socket 755 processor). I recently bought more ram for it only to realise it can't support more than 3GB (despite the manual saying it will support up to 4GB)... Speed is not a major issue here as it is a file server, but I want to be able to reuse all my other components. I'd also like to be able to reuse all the RAM (although some is only PC2-5300, most is PC2-6400), so 4 ram slots would be ideal.
well it will support 4GB of ram, its just that a 32bit Operating System can only use 3.25GB of ram. Now if your Motherboard and other hardware is able to support a 64bit O.S, then it might be a good idea to install the 4GB just in case you ever decide to upgrade to windows7 64bit.