Sorry that I didn't put this in the "buy and sell" forums, I am not the one selling it and I was just pointing a finger in the right direction for those interested in upgrading ram without screwing up their xbox. The people into upgrading ram usually go to the general technical chat so that is why I thought it would fit best to post in here. That's my opinion I could be wrong but oh well, if someone gets too upset over it they can move it.
As far as it being pointless or useless to have extra ram on the xbox, that's like saying it's pointless to have emulators at all on the xbox because you can just use them all on the pc. But some people hate using emulators on the pc, especially when you have younger kids etc playing. So you have to waste some money or whatever, but in general, videogames, entertainment etc is ALL a waste of money to begin with. If we want to spend 200 bucks to upgrade our user-friendly xboxes instead of upgrading our pcs then that is our choice.
Upgrading the Ram will mostly benefit linux, BUT there are emulators that crave more ram and a good amount of games won't run because of it (especially N64 emus). Also, there is a patcher you can download from xbox-scene to take the 64mb flag off so you can play all of your xbox games to utilize the extra ram. Giving you a slightly better picture quality and sound on certain games. Nothing so great to go crazy over, but every little bit helps, especially if you are going to play split screen games.
As far as needing a modchip to upgrade ram, as far as I heard you will need a new bios that will recognize the extra ram, but others say something else. The motherboard they provide isn't modded or anything, but according to the website they point out that it is "xbox live compatible" but I'll let you know one way or the other when I get everything.
But because of the fact that you need a locked hard drive you will need to at least temporarily mod it to install a hard drive and lock it with config magic etc.