The 1366 hardware would be bottlenecked by using dual channel ram. Plus 3GB's is nothing. Here I have Windows 7 Home Premium 64-Bit with and Email Client, iTunes, Opera with only 12 tabs..., and background apps like antivirus, firewall, windows gadets...etc and i'm pushing 2GB. 6GB gives you freedom, you don't need to worry about to many applications being open. Moreover a lot apps, once close still leave a bunch of ram used, its buggy. So eventually your 3GB will run out and you'll have to reboot, if you have 6GB you won't need to reboot for weeks.