Hey i finally bought and installed 4 gigs of ram on my macbook pro but. THe computer recognizes that it has 4 gigs but in istat it says otherwise. IN the istat it says that 2.3 gigs are free. So were the hell are the other 1.7 going. i the only application working is safari. Also are there any test i could perform to see that i am really getting the full 4 gig experience?