have you load the PBG3 firmware update that allows the book recognized all availabe installed ram? I have 2 512MB on both upper and lower slot on my Pismo 400 and works just fine. If you suspect something wrong with the chip, then run Apple hardware test CD came with your PB. -- G-Books is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Enter to win a FREE Titanium G4 PowerBook! -- | & CDRWs on Sale! | Save on Mac software -- Shop Software Outlet.com <http://lowendmac.com/ad/software.outlet.html> Star Trek Collection: Movies 1-7 on VideoCD, $38.88 from CoolVCD <http://lowendmac.com/ad/coolvcd.html> - - - - - G-Books list info: <http://lowendmac.com/lists/g-books.html> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-books%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>