Apple MacBook Pro 17-inch (original, Core 2 Duo, 2.4GHz, Late 2007 CTO, Early 2008, and Late 2008) - Manual (Page 23)

MacBook Pro 17-inch (original, Core 2 Duo, 2.4/2.6GHz, 2008) Take Apart — Memory 23
Replacement Procedure
Notes:
DDR memory cards do not fit in this slot, only DDR2 (different notch location). •
If installing two cards, install into the bottom slot first. •
Align the notch in the memory card with the tooth in the slot before inserting. •
To install memory cards, insert them at a 30-degree angle. 1. Note: Insert the bottom card
behind the locking tabs of the top slot.
Firmly push the card straight into the slot until it is fully and securely seated along its length. 2.
Note: If the back of the card drops down before it is fully seated, raise it up enough to push
it fully into the slot.
When the card is fully seated, push the card straight down until the tabs click onto both 3.
sides of the card, locking it into place.