Most Computers & electronic devices contain circuit boards and other components inside that will contain many types of precious metals.
Computer components containing valuable metals include Motherboards, connector cards, graphic cards, memory cards, CPU's and other various small electronic components, connectors/cables & Hard drives.
Computer CPU's (processors) have the most precious metal value by weight, followed by Memory (RAM) & Circuit Board Fingers / Connectors / Pins, then Circuit Boards (Motherboards), then cables / wires, with hard drives & whole computers being last.
CD/DVD drives, monitors, cases, keyboards/mouse, printers, scanners & power supplies typically do not contain enough precious metal to be considered of value.
Aerospace / defense, scientific / test, and telecommunications computers will typically have PCB cards and other components with a higher level of precious metals due to the need for higher quality and reliability.
Precious metals - where they are found inside Computers:
List of Chemical Elements used in Computers & Electronics:
Magnesium, Radium, Barium, Niobium, Osmium, Cobalt, Manganese, Titanium, Hafnium, Tungsten, Germanium, Gold, Silver, Copper, Mercury, Bismeth, Silicon, Gallium, Zinc, Iron, Sulfur, Phosphorus, Cadmium, Palladium, Tantalum, Platinum, Aluminum, Carbon, Lead, Nickel, Boron, Chromium, Potassium, Fancium, Casium, Sodium, Lithium, Calcium, Nitrogen, Oxygen , Arsenic, neodymium, Selenium, & Tin.
Related: Gold in Computer Chips
AMD Amdahl Analog Devices Apple Atari AT&T Bell Labs Burroughs
Control Data Cray Cyrix Data General DEC ESI Fujitsu HP Hughes
IBM Intel ITT LSI Memorex Micron MIT Microvision Motorola National Semi
NCR NEC Nvidia Panasonic PHILCO PMI RCA Remington Rand Samsung
Signetics Sperry Sun Microsystems TSMC UNIVAC Western Electric Etc.