Apple PowerBook (3400 series) - Manual (Page 156)

Getting ready
You will need the RAM expansion card and a screwdriver with a Torx T-8
head. (Your card may come with a Torx T-8 screwdriver. If you need to
purchase a Torx T-8 screwdriver, you can probably find one at a hardware
or electronics supply store.)
IMPORTANT No other type of screwdriver can be used to install the RAM card
in your Macintosh PowerBook.
Make sure you are installing a RAM card made for a Macintosh PowerBook
3400 series computer. You can’t install a card made for another PowerBook
model, such as the 5300 series, in your computer. The RAM card must use
low-profile memory chips.
Connector Low-profile memory chips
(The number and position of the chips on your
RAM card may differ from those shown.)
156 Appendix C