AS + Gold filings?

[m_silkstone]

What do you think (theoretical question) would AS mix well with 24K gold filings to give better thermal conductivity?

 

[bc4]

I wouldn't think so. The purpose of thermal paste is to "fill" in the gaps to provide maximum contact. No matter how small the fillings would be, they would not be as good as a paste.

I think a better theoretical question would be, what if both the processor and heatsink were plated in gold, then buffed smooth --- would that provide better thermal conductivity? --- eliminating the need for a paste

 

[m_silkstone]

Melt some gold on the HS, then while it is still liquid press the CPU into it? Would make a perfect fit and it has i higher conductivity than copper, so should work.
hmmmmm

 

[jeanluclariviere]

Sure, aside from the fact that gold melts at about 1000 degrees celcius lol...

 

[antiacid]

Gold — Melting Point: 1337.33 K (1064.18 °C, 1947.52 °F)

Gold is 1337, science proved it!

 

[cjl]

One problem. It already has silver. Silver conducts heat significantly better than gold. The only thing that beats silver for thermal conductivity is actually diamond.

Gold is the best in electrical conductivity, not thermal.

So, the best for thermal conductivity would actually be a diamond wafer for the CPU instead of silicon (something that is actually theoretically possible), and a diamond heatsink directly contacting the CPU die (as close to perfectly mated as possible).

 

[Shadow703793]

^+1. Well said!

 

[m_silkstone]

Cjl> Yea, i just saw the difference in thermal conductivity after i posted the message. It's strange as they used gold under the hood/bonnet of the McLaren F1 road car to give it better heat dissipation, why didn't the use silver i wonder?

 

[V3NOM]

well idk about that... i figured since gold conducts electricity better than silver i assumed it would also conduct heat better lol

 

[Shadow703793]

Cjl> Yea, i just saw the difference in thermal conductivity after i posted the message. It's strange as they used gold under the hood/bonnet of the McLaren F1 road car to give it better heat dissipation, why didn't the use silver i wonder?

Cause it's a F1 car. What did you expect? :lol:

 

[m_silkstone]

Actually i think the thermal diffusivity of gold is a lot higher, leading to faster temperature changes and so a more stable system. although the thermal conductivity of gold is about 110  W·m−1·K−1 lower, gold should transfer the heat more quickly? any metalurgists(sp?) on these forums??

 

[cjl]

Thermal conductivity determines how fast the heat transfers. It really is that simple. Thermal diffusivity determines how quickly something will cool itself, but not how well it works as a heatsink. That is almost exclusively determined by the thermal conductivity, and gold simply loses to silver in that respect.

 

[m_silkstone]

Thermal conductivity determines how fast the heat transfers. It really is that simple. Thermal diffusivity determines how quickly something will cool itself, but not how well it works as a heatsink. That is almost exclusively determined by the thermal conductivity, and gold simply loses to silver in that respect.

Thanks cjl> after doing some reading i came to the same conclusion. The gold on the McLaren must just be for bragging rights.
Although silver is much more expensive than copper and has very similar thermal conductivites, makes me wonder why then they don't use a purer copper HS compound. Maybe it has something due to its electrical conductance.

 

[cjl]

Probably also for some level of bragging rights as well - it just sounds better to say that something has silver in it.

Of course, I'd like to see a pure diamond heatsink

 

[antiacid]

cjl: I think your GF/Wife would wonder why your computer has a diamond bigger than hers.

That alone would reduce your sexual conductivity to nothing.

 

[spathotan]

You can always buy some of that diamond dust paste. Frozen CPU sells it in two different karots.

http://www.frozencpu.com/products/7299/thr-44/Innovation_Cooling_Diamond_24_Carat_Thermal_Compound_-_48_Grams.html

http://www.frozencpu.com/products/7038/thr-41/Innovation_Cooling_Diamond_7_Carat_Thermal_Compound_-_15_Grams.html

 

[V3NOM]

cjl: I think your GF/Wife would wonder why your computer has a diamond bigger than hers.

That alone would reduce your sexual conductivity to nothing.

ROFLMAO :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: