i have a easy way to deal with boards.
go get rear end out of old car, open the chunk, cut sqare whole it it at other side. cut board to manageable size. then drop in chunk. it will turn that board to dust. and let it all come out the whole into bucket float in water to sperate plastic from metal. then process remaining ammount.
oh yeah degrease the chunk first. and use a 5hp engin to run the gears. or a high torque low speed electic motor.
for ceramic CPU's get steel tube cap the bottom with screw cap. get steel rod that can move inside tube with about half inch room on either side...weld a steel + sign on bottom. and made industrial slap chop for powdering those CPU's up...LOL
cause i learned already you will make more processing them yourself than selling casue most buyers dont want to give you even 10% the value. but thats how they turn profit.