I have an older model Toshiba Laptop Satellite 2805-S603 it is upgradeable to 384 by changing the RAM chip to 256 PC 100 -- now the first chip I purchased didn't work at all so I exchanged it for another (cheaper ) but when I check the status it still only shows the original 256 RAM...? I also have had to reformat the HDD and reinstall the OS runing windows XP home -- now waiting to see if it will recognize the upgraded ram.. any pointers out there that may be causing the problem?