Don't try to pry one side out completely before the others. You'll bend some pins. You need to work around the CPU and try to pry all sides up a little at a time until it comes loose. Your risk of bending pins is greatly reduced. I have a full 040 in my Performa 631CD and it makes a difference. I wish I was brave enough to change the clock resistor on the motherboard to get it up to 40mhz.