Hello gurus! I just got a new 1 gig ram chip to add to the second slot of my Powerbook g4 17 inch laptop. I already had a 512 chip in there so I thought that with my new addition I would have 1.5 gigs of RAM - but I noticed that now my computer only reports 1 gig. Any ideas why only half of my new ram is noticed? Is it not recognizing my old card? Thanks for any help you can give me!