How much are these CPUs really worth?

[Anonymous]

The chips from the 70's contained 10 gramms of gold per chip, back then the gold was not so expensive like today.

 

[goldsilverpro]

The chips from the 70's contained 10 gramms of gold per chip, back then the gold was not so expensive like today.

I've never seen any 70s chips that ran even close to 10 grams each and I started in the 60s. Can you give me an example?

Even though the gold price was lower, people weren't stupid back then. The gold thickness then was basically the same as it is today. Nobody puts more gold on a part (and never has) than what is necessary. From day 1, they have always tried to reduce the amount of gold. Gold has never been cheap. Today, however, the parts are designed so that there is less gold plated surface area. Also, on less critical parts, non-gold brazes are used.

Technology has reduced the amount of gold on parts. The higher price does motivate research in this direction but, they have never put on extra gold.

 

[koebeef]

How does one remove the gold plating (if it is gold plating) on the other side of the chip, where it is stamped pentium pro.

 

[Anonymous]

Hey got info that a pen pro has 1g per/////see att

sex is better then Gold

 

[lazersteve]

For my Borther's injoy cost me few $$$$

Are you saying you paid for the information in the attachment?

You can download it for free from my website:

http://www.goldrecovery.us

If you paid for it what did you pay?


Steve

 

[Harvester3]

Hey,
In the Forum Handbook there is a bucket of lids and a caption which reads "22lbs. = 22oz. " is this data dependent on the model of cpu the lid originated from, or any gold lid?
Thanks

 

[goldsilverpro]

I have run a lot of package lids from old CPUs using the electrolytic sulfuric cell (although modified). Completely gold plated lids with a Au/Sn solder preform attached around the perimeter of one side typically ran 1 tr.oz. of gold per pound of lids. This is for new unused lids. For lids that have been removed from sealed packages, the numbers will be less, since part of the solder will be attached to the seal ring on the package.

 

[Harvester3]

thanks for the info. Out of curiosity, where do you come by unused lids?
Also, if one were talking about CPUs such as the Pentium pro which has plated top as well, what percentage of total AU is the bottom lid would you think?
Thanks

 

[goldsilverpro]

Most all of the material I refined was rejects from electronics manufacturers. One time, e.g., we got 1100# of unused lids.

 

[Harvester3]

Sweet! I just did the math in my head. Really sweet!