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Copper vs. Nickel thermal conductivity?

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March 10, 2011 8:21:50 PM

What is better copper or nickel? (Waterblocks/Heatsinks) :bounce: 
a c 324 K Overclocking
March 10, 2011 8:22:59 PM

Waterblocks and heatsinks are typically only nickel-plated, so your comparison isn't a 1:1.

Nickel plating is only for looks and corrosion prevention.
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a b K Overclocking
March 10, 2011 8:35:59 PM

Quote Ginger john
Well they all perform the same, the only difference is looks, and the nickel prevents the copper from oxidising. Again, this will not affect the performance of the block.


http://www.overclock.net/water-cooling/847585-gold-vs-n...
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a b K Overclocking
March 10, 2011 8:41:43 PM

Thermal conductivity values. Unless you can get a artificial diamond or silver water block, copper is the best choice and that's what most if not all heatsinks, air and water, use.
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a b K Overclocking
March 10, 2011 9:06:02 PM

Thermal conductivity of Nickel is 90.9 W/(m·K).

Thermal conductivity of Copper is 401 W/(m·K).

The electroplated nickel on the copper block is so thin that it can virtually be ignored when considering thermal conductivity.

It would be stupid to make a block out of solid nickel. Its thermal performance would be terrible.

Silver is only 7% better than copper but is much more expensive. Pure silver also oxidizes quicker than copper. About 10 years ago, when silver was much cheaper, there was a heatsink, the Noise Control Silverado, that used a 50 gram slug of pure silver.
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a c 324 K Overclocking
March 10, 2011 9:23:28 PM

Yes.

Again...like I mentioned, the nickel on blocks is only for aesthetics; it serves no real cooling purpose. But, great additional supporting info.
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March 10, 2011 9:24:31 PM

ko888 said:
... the Noise Control Silverado, that used a 50 gram slug of pure silver.


Which as of this moment is $58.31 for just the silver.
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a c 324 K Overclocking
March 10, 2011 11:12:39 PM

^LOL @ your little blurb on magic smoke.

Classic.
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March 10, 2011 11:50:28 PM

Hey, graphene in wiki? I take it that's some sort of form of Carbon? Is it possible to develop a paste for that since it's the highest in that wiki table?
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a c 324 K Overclocking
March 11, 2011 12:15:46 AM

^Yes, it's pretty much an atomically altered derivative of graphite. However, given the fact that it's typically produced in a lab at the atomic level via sophisticated and controlled methods, I'm guessing that alone would put it financially beyond mainstream PC applications.

Graphene Wiki

A pretty interesting read; and considering it was the basis of a Scientific Nobel Prize in the last few years, I think development into other areas of application will be explored before it makes it into a tube of TIM.
Quote:
In 2008 graphene produced by exfoliation was one of the most expensive materials on Earth, with a sample that can be placed at the cross section of a human hair costing more than $1,000 as of April 2008 (about $100,000,000/cm^2)
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a b K Overclocking
March 11, 2011 12:43:46 AM

They are working on methods of mass production that hopefully will allow for applications to begin to become practical in the near future. IIRC, in that same article it is mentioned that the price of a graphene coated silicon carbide wafer was $100 per cm^2, still a little pricey, but for a high end chip not horrible.
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a c 324 K Overclocking
March 11, 2011 1:12:30 AM

It will have to find its way into a practical application as a thermal transfer material, first. However, it's likely it would be used for actual computing applications instead.
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a b K Overclocking
March 11, 2011 1:43:26 AM

I'm having the Hope Diamond reshaped and hollowed out a bit so I can use it for my cpu water block.
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a b K Overclocking
March 11, 2011 1:51:09 AM

lol thats about where i though this was going
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a b K Overclocking
March 11, 2011 2:25:52 AM

christop said:
I'm having the Hope Diamond reshaped and hollowed out a bit so I can use it for my cpu water block.


lol. I couldn't think of a better use for it myself.
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March 11, 2011 11:06:26 AM

rubix_1011 said:
^LOL @ your little blurb on magic smoke.


I live for those times when I get to say, "Welp, you let the magic smoke out. It's pretty much dead."
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a c 324 K Overclocking
March 11, 2011 12:31:40 PM

Quote:
I'm having the Hope Diamond reshaped and hollowed out a bit so I can use it for my cpu water block.


I made the old woman from Titanic swim down and get the necklace she dropped...old bat.
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a c 324 K Overclocking
March 13, 2011 11:05:42 PM

Winona Ryder would out-shoplift Lindsay any day; hands down.
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