Oh, I know what XP doesn't recognize. I've got 4gb of RAM in my computer, and not all of it is being used. My computer cost me near 1k, and I'm sure a good amount of it is 'going to waste' right now.
But the bottom line is, it's still better than Vista. And Istaria runs beautifully, as do all other games I play at the moment.
Still, I wish Vista didn't suck so I could upgrade to it...