On each side of each RAM card, there will be a thin strip of metal that is holding the chip down. Using tweezers or another thin tool, gently push these pins apart.
The first RAM card should pop up on its own. Gently remove this card, and look for the two strips of metal holding the bottom card down.
Push the pins apart just like for card one. Just like the first card, this one will pop up and you can remove it.