My new MacPro, just got it 3 days
ago.http://att.macrumors.com/attachment.php?attachmentid=82145&stc=1&d=1186873702
Its because you're running the 32-bit version of Vista.
You need 64-bit to see all 4 GB of RAM.
http://episteme.arstechnica.com/eve/forums/a/tpc/f/12009443/m/324001375831/r/768008575831
Eat your heart out -- Mine's older!
4 gb drive and 800 Mhz processor, I think.
Also have a G3 iMac 350 mhz 576 mb ram 6GB HDD. Can't take a screenshot due to broken keyboard.