Gold is used in many places on computer motherboards: IDE ports, PCI Express slots, PCI, AGP, and ISA, as well as other ports, jumpers, processor sockets, and DIMMs on older motherboards, which are often covered with a layer of gold a few micrometers thick.
The memory chip also has gold, but it is very thin and can be seen right where the gold finger (intended for contact conduction) is. Memory gold finger is the memory chip and the motherboard slot connected, arranged in a row of contacts, can also be said to be conductors, in order to ensure that the exposed conductive bit is not oxidized, so it is generally gold-plated.
The connection part of the chip (cpu), the connection part of the board (commonly known as the goldfinger) and various connection plugs. High-frequency head, and so on need to antioxidant electrical connection parts, generally the higher the integration of the higher the gold content (because the antioxidant demand is higher and the temperature of these parts is generally the highest, if only copper once the oxidation chip directly fails or runs incorrectly, but the cost reason is only gold plating).
The pins of waste computer cpus contain gold at most to make more backward chips than advanced ones, because the accuracy of the gold-plating process is different, but it seems basically the same now.