Central Processing Units (CPUs) - These are the large square microchip-looking things you'll find on motherboards. They tend to have hundreds of gold-plated pins around their edge and undersurface. It could be worth a pretty penny if you have a large cache of them.
Circuits in modern CPUs and Laptops weigh around 100 gm so you can expect to extract 0.150 grams of Gold. Additionally, the wires and connector pins have gold which will amount to another 0.070 gram and another 0.090 grams for gold plated contacts.
According to the U.S. Geological Survey, there are 0.034 grams of gold in a cell phone and, again, these are usually used in electrical connectors, forming the wirings inside chips and microchips, again for its malleability, corrosion resistance and conductivity.
Despite these challenges, the extraction of gold from electronics can be worth it for individuals looking to recover valuable metals and reduce e-waste. Additionally, gold prices are constantly increasing, making it an attractive investment for those looking to extract gold from electronics.
Among all home devices, computers and televisions typically contain the most gold. Gold is also found in the circuit boards of earlier generations of cameras, radios, and media players. Traces of gold can be found in other electronics like game consoles, tablets, and phones.
Motherboards and printed circuit boards - The motherboard is often the best potential source of gold in computers. The edges of most components on the board will have gold contacts and connectors where the wires slide in. You will often find thin layers of gold on the motherboard's surface.
This is because the gold content in rams is about 0.155%, which means that there is 15.5 milligrams of gold in every gram of rams. So, if you have 1 kilogram of rams, which is equal to 1000 grams, you will have 15.5 grams of gold.
How much gold is in a computer hard drive? It is possible to find gold plating in small traces, not only in hard drives, RAM memory sticks, but in many other components of desktop or laptop computers. The exact amount can vary around 0.3 gram of gold worth around $20.
The processors and connectors in computers, tablets, and smartphones use gold. You can also find gold in televisions, gaming consoles, printers, or essentially anything electronic.
TVs usually contain a very small amount of gold that might amount to about $1.00 or less in value. It can be quite a lot of work to get to the gold inside your TV as well.
Gold in iPhones
A typical iPhone is estimated to house around 0.034g of gold, 0.34g of silver, 0.015g of palladium and less than one-thousandth of a gram of platinum. It also contains the less valuable but still significant aluminum (25g) and copper (around 15g).
CPUs have a high content of gold – it could be as much as 0.2 g to 0.5 g! Melting and processing of parts from several devices yield up to 1–2 g of gold.
Microchipping your dog typically costs around $50, according to Dr. Bethany Hsia, D.V.M. and co-founder of CodaPet, a network of veterinarians who provide in-home end-of-life care for pets.
In another container, mix two parts hydrochloric acid and one part weak hydrogen peroxide (a concentration of three per cent). Pour this mixture over the circuit boards so they are completely submerged. Wait for a week, giving the vessel a stir every day with a glass or plastic rod.
Pour nitric acid into the glass container over the circuit boards. Stir the mixture with the glass or metal rod until the contents become a uniform fluid. Once the gold has separated from the plates — it may take some time — strain the nitric acid from the mix using the filter. Take out the pieces that aren't melted.
the largest 72kg gold nugget ever found (called the Welcome Stranger), today this nugget would be worth approximately $4.5M USD, discovered by two miners John Deason and Richard Oates on February 5, 1869, near Moliagul, in the state of Victoria, Australia.
Gold is an important element in the design of printed circuit boards, and looking closely at most PCBs will reveal that the 'fingers' on the board include metal contacts fabricated from gold.
Motherboards – the biggest circuit boards inside both laptops and desktops – often contain the “mother lode” of gold in used computers. Their edges have gold contacts and connectors where wires slide on. You will also find thin layers of gold applied to motherboards' surfaces.