I reformatted last night and went from Vista Ultimate 64 back to XP Pro 32 just to do it because I was bored. My Vista Ultimate was using 1 GB or more of RAM at idle. Check the screen shot out below to see what XP used.
Please understand, this is not a bash Vista post or anything because I really like Vista. I just forgot how much less RAM XP uses versus Vista. I know Vista uses more because it's doing more.
I'll go back to Vista again soon but just wanted to use XP for a bit. I ask myself.....why not get an extra HDD and have both? I'm an idiot!