Slide the flat end of your Framework Screwdriver under the heatsink arm labeled "2".

Twist the Framework Screwdriver to lift the heatsink arm and loosen the heatsink.

You'll feel some resistance from the thermal compound holding the heatsink in place.

If the heatsink won't budge, make sure you've fully loosened the four screws securing the heatsink.

Repeat the procedure with the heatsink arm labeled "3".