Presence of Platinum in a Hard Drive

The need for modern computers to store very large amounts of information has brought a rapid increase in the use of platinum to improve the data storage capacity of hard disks. The first hard disk drive, introduced by IBM in 1957, used fifty disks, each measuring 24 inches in diameter, to store just 5 megabytes of data. Nowadays, PC hard disks are available which can store 125 gigabytes (125,000 megabytes) of data, and capacity is increasing all the time. Manufacturers aim to continually reduce the average number of hard disks in each drive, so technology which can offer denser data storage is eagerly sought after.

Adding platinum enhances the magnetic qualities of the cobalt alloy, enabling data to be stored at higher densities and improving access times. Today, all hard disks contain platinum in their magnetic layers, compared with around 50 per cent in 1997. The proportion of platinum in the magnetic alloy has been increasing steadily over time, from less than 10 per cent five years ago to over 35 per cent, on average, today.

Presence of Gold in CD’s & DVD’s

With a CD having a diameter of 12 cm, and the inner non-writable part having a diameter of 4 cm, we get a total writable area of around 100 cm². I read somewhere that the different densities of the “gold, silver, aluminum” layer are between 20 to 100 nanometers (billionths of a meter). Assuming the worst case scenario, 100 nanos, we get a total gold volume of 0.00001 cm³. At a gold density of about 19.5 g/cm³ this volume equals 0.000195 g. With one troy ounce equal to 31.1 g., this weight of gold equals 0.00000627 troy oz., or rather, one troy ounce of gold is good for 160,000 CD-Rs. At a gold price of U$S 450 per troy ounce, there is U$S 0.0028 gold per CD-R, or 0.28 cents worth of gold. Of course, the density of the gold layer could be as low as 20 nanometers. In that case, the gold content in the CD would be worth 0.06 cents, and one ounce of gold would be good for 800,000 CD-Rs. So there you have it.

One final step. 10 billion writable CDs are sold every year (versus 20 billion audio CDs). The gold/silver CDs are phthalocyanine, and I read this type of CD is second in market share. So let's give the gold/silver CDs a 25% market share. Now let's assume the gold variety is about half of that, so the total gold CD market share is about 12%, or 1.2 billion CDs annually. With one ounce of gold good for 160,000-800,000 CDs, we need a block of gold every year that is from 2,400 to 12,000 cm³ or a cube with each side being 13 to 23 cm long (5 to 9 inches). This block would weigh 100 to 500 pounds and be worth 700,000 to 3,400,000 dollars. So there you have it.


Presence of Gold and Other Precious Metals in Circuit Boards

In all electronic devices we find circuit boards inside them, in this article we will discuss about the most common circuit boards that can be found in a normal computer.

By the side of the powder supply all of the circuit boards in the computer contain some precious metals in them:
Motherboards, ISA cards, graphic cards, memory card etc.
Most circuit boards contain all sorts of precious metals: Gold, Silver, Palladium and sometimes Platinum.
All circuit boards contain base metals: Copper, Nickel, Aluminum, Zinc, Tin, Lead and Iron.
As well, small amount of hazardous elements like Beryllium, Barium and others that has to be considered while processing scrap circuit boards.
Pins that contain Gold in Computer Board are listed below:
1)      North and south bridge, written as “INTEL” chip contains microscale gold wires inside and gold plated traces between the ceramics to the fiber.
2)      Female connector pins, plated with gold.
3)      Integrated circuit, also known as quad IC, contains microscale gold wires inside.
4)      Visible gold plated pins and edges do not need mentioning. All the pins on the motherboard plated with gold is actually a copper pin coated with nickel and then finally coated with pure GOLD so as to reduce rusting of the pins.
Scrap your computers metals, and EBay off the gold, if you only had 3 computers the yield will be so low it will be near impossible to recover, you may have up to 1/100th of a gram in all of it.