I would take some time and do research on the forum first.You are missing an aweful lot of things here.And you never throw pcb's away,it is not only illegal but you are wasting a lot of copper.Most of the members on the forum take a few select parts from mobo's and sell the rest of the boards the way they are.Unless you have a lot of time,or a way to process boards on a large scale it is not cost effective to strip every component off of mobo's.This has been discussed many times ont he forum,if a mobo contains a total of $5 worth of PM's and it cost $1 to process it,but you can sell it right now for $3+ and not have to do anything,is it worth it? That is simply a question you have to ask yourself.To people that can recover on a larger scale,the answer is yes.To most recreational refiners,the answer is no,it would be more beneficial to stick with a higher percentage gold bearing product like cpu's,memory,fingers....you get the idea.So considering you are not sure what is what on these boards,my answer would be a definite no.Take the cpus and memory off and sell them,until you get more familiar with mobo's.