Motherboards - the largest circuit boards inside laptops and desktops - often contain a \"mother lode\" of gold.
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Gold is used in many places on 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.
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cpu
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The central processing unit is a square, microchip-like component that you plug into the motherboard.
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The CPU is gold-plated with nanotechnology. And only use it in the most critical areas.
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Usually, the place where they hide gold is around their edges, with hundreds of gold-plated stitches, and if you have enough of them, they can be worth a lot of money.
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memory chip
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Memory chips also have gold, but it is thin, measured in um, and can be seen right where the gold finger (intended for contact conduction) is.
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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.
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Internal modem, Ethernet interface board, graphics card and other peripherals
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Almost all desktop computers contain at least two of these \"extra\" boards. They can contain a lot of gold - both in their stitching and in their surface layer.