Thermal grease that will not freeze at LN2 temperatures

[uncle fester]

Hello,

I am writing here to ask a question that maybe someone here can answer.

My friends and I do what is call extreme overclocking. We use Liquid Nitrogen to super cool computer processors to make them run at far beyond manufacturers expectations and calculate things like super pi.

We are facing an issue, We use a copper pot to fill with liquid nitrogen and then place this on top of the (IHS) Internal heat spreader of the CPU, now we have been testing thermal pastes/ greases as the medium between these.

We are finding that if we place a k-type probe on the IHS and the bottom of the copper pot, once we pass -130c there becomes a massive delta between the two probes, our assumption is that the thermal grease is freezing therefore it no longer conductive of temperatures.

Do any of you know if there is any thermal grease or paste that will not freeze and will remain temperature conductive to -192c ?

I hope i have put this thread in the right sub forum.

for an example of what we do here is a small you tube clip

 

 

Kind regards,

Jon.

[CaptainPanic]

I think your problem is that you do not know the right keywords.

 

"Very frickin' cold" is called "cryogenic" in the engineering field.

And "grease" is called "lubricant".

 

Just Googling a bit with those keywords got me this: http://www.2spi.com/catalog/vac/apiezon/apiezon-n.php which is a lube that seems good enough for almost anything.

 

But maybe there exist other solutions too?

[uncle fester]

Wow now i feel really stupid

thankyou very much i will do some investigating.

one you pointed it out my brain is slapping me.

[CaptainPanic]

Wow now i feel really stupid

thankyou very much i will do some investigating.

one you pointed it out my brain is slapping me.

Nah.

It's very normal that you don't know the right words... and it's a small thing for people to explain them.

Meanwhile, keep checking this thread - there may be some better help later on.