Most of the gold on boards and processors is plated pins and fingers....Most connectors on computers are plated in gold or at least gold tipped. However, getting the gold off the boards is difficult and dangerous to say the least. Not to mention the fact that taking the gold off the boards is only half the battle. After it is pulled from the boards it has to be refined. There are some "at home" methods but they are toxic and can get a person in a lot of trouble. The best thing to do with the boards is just sell them to a refiner, like through Ebay