Heatsink compund / grease / whatever you want to call it!

Cooling Processors quietly

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RichA
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Heatsink compund / grease / whatever you want to call it!

Post by RichA » Sat Jul 14, 2007 8:49 pm

Hello,

Just curious if anyone on here has tried using copper grease instead of the expensive pastes most people seem to use?

It's available from any motor factors for very little money, and won't go runny or anything like that. Conducts heat better than generic silicon grease(which is cheapest at a plumbers merchants), but you need to ensure it is kept away from any electrical contacts on the CPU - it'll conduct.

On my Athlon XP, I covered all electrical contacts with a thin smear of the generic silicon grease.

Can't compare how it performs to the expensive branded stuff, but it's much more effective than silicon grease or thermal pads - I think the first time I tried it(several years ago), I dropped some 6-8C under full load...

--Rich

continuum
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Post by continuum » Sat Jul 14, 2007 9:54 pm

Will it dry out? That's going to be a huge potential issue.

The best thermal pads actually work just as well as the most fancy thermal greases out there.

jaldridge6
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Post by jaldridge6 » Sat Jul 14, 2007 10:08 pm

arctic talks about using automotive grease. apparently, if the grease can't dry out, it'll really fuck things up. I dunno, $5 for a tube of arctic silver is hardly what i'd call expensive when you've just blown $40 on a heatsink and $150 on a processor.

RichA
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Post by RichA » Sat Jul 14, 2007 11:24 pm

It goes tacky. But it stays useful for years - over here it's £1.50 or so for more than you'll ever use on a computer. The arctic stuff is considerably more.

My Athlon has been up 24/7 since 2002 with no ill-effects. Before that I've used it successfully on my 2 Celerons.

This is the kind of stuff I'm talking about. Generally used on the back of brake pads, threads on exhaust manifolds, etc.

ETA - Saying it goes tacky is wrong, really. It goes tacky and manky on the back of brake pads - after being abused by the elements and miles of brake dust...

--Rich

Redzo
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Post by Redzo » Sun Jul 15, 2007 12:56 am

Here a package of AS5 costs 3-4€ and it will last thru 5-7 CPU's. I don't see any point in chasing pennies...

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Post by thejamppa » Sun Jul 15, 2007 1:29 am

AS5, As Cerámique and Zalman STG1 are all usually 3 to 7€'s around here. All are excellent thermal greases. I have all of them at stock for some reason. I mainly use AS5 but I use alot STG1. Now in this system I have in my siggy is made with STG1. Some say MX-1 is superior to AS5 or STG-1 but its not available in here.

I've heard copper greases only bran that I know manufacters such is coolermaster. But I think Silver greases like AS5 are better since more "valuable" the metal is, better its properties are. And silver is much more purer than copper. I am not sure does this apply in thermal things since its 7 years from my last physics / chemistry lesson.

But Basicly they say: Even toothpaste works between HSF and processor.
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Das_Saunamies
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Post by Das_Saunamies » Sun Jul 15, 2007 1:33 am

Cheapest I could find on the Google first 10 search results was £4... so if three pounds and postage really matters to you more than electrical safety, go for it. :lol:

Have you ever taken those coolers off and tried cleaning it up? AS and the like wipe clean off and even if you spill a little, no immediate harm done. The copper grease I have in the garage sticks to surfaces real tight, and since it's highly conductive, any reserve power would jump straight through.

These thermal pastes are not expensive. A 5€ tube has lasted me four PCs and is still going strong. That puts the cost at 1.25€ per PC. Saving on that while endangering some of the more critical and expensive components is pointless. I very much doubt there would be a dramatic increase in thermal conductivity either. What we have now is pretty much as good as it gets when used right, dissipation has its limitations too.
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RichA
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Post by RichA » Sun Jul 15, 2007 5:59 am

Copper grease wipes straight off. It's a doddle to work with, it really is.

I've been out of the loop for several years now, but the last I heard, Arctic Silver was virtually all aluminium? Don't get fooled with claims like "99.9% pure sulver" - all it means is the silver content is 99.9% pure, not that the paste is 99.9% silver... ;)

A 100g tube costs £2.50 online, but a smaller tube is readily available from a local motor factors. A few years ago I picked up a small sachet from my local motor factors for 50p.

Don't get me wrong here - I'm not stating that it is, or indeed isn't, any better than Arctic Silver. But what I am saying is that it works very well when compared to regular thermal grease, is often cheaper, and will likely prove to be rather more useful around the home than a small tube of Arctic Silver. Plus, it's available in any small town for reasonable money, whereas buying arctic silver from a smaller, local computer shop is likely to cost somewhat more than online.

Cheers,

--Rich

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Post by Bluefront » Sun Jul 15, 2007 6:28 am

FWIW.....I've used automotive-type copper brake caliper grease as a TIM...a bunch of times. On a CPU heatsink, it really doesn't turn hard or dry out (for as long as I've tried it anyway). This stuff is made to hold up to extremely high temps.....much higher than a CPU ever gets.

As to how it performs as a TIM, compared to AS5 for instance......seems to be the same to me. I've got a small can of the stuff that should last a life-time. Keep the top of the can tight and it never dries out.
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Das_Saunamies
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Post by Das_Saunamies » Sun Jul 15, 2007 9:25 am

Fair enough.

Thank you for discussing the points and bringing this up, I'm still sticking to the safe option. :)
Case: Define Mini
Parts: P8Z77-M Pro µATX, i5-3570K, STRIX-GTX960-DC2OC-4GD5, 8 GB G.Skill DDR3U, Xonar DX, WD B-G 1 TB, mx100 256 GB, RX-5300 PSU
Cooling: Noctua NH-U12P SE2 + Scythe SS PWM, 2x Noctua NF-P12
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peteamer
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Post by peteamer » Sun Jul 15, 2007 9:50 am

Is nobody going to link to the toothpaste and Marmite page?.....


:D

Max Slowik
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Post by Max Slowik » Sun Jul 15, 2007 11:07 am

http://www.dansdata.com/goop.htm

Found it! Took too damn long, though. I'm consistently impressed with his Anglic prose. . .
Hardware Editor @ www.thetechlounge.com

Das_Saunamies
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Post by Das_Saunamies » Mon Jul 16, 2007 4:48 am

Funny. I'm so fresh I haven't seen that one before either.

But yes, good points: even if you use platinum in the paste, it may not make it conduct much better, but it'll be purpose-built stuff that won't corrode, short-circuit or any of that other nasty stuff. And that's what helps me sleep at night, as long as the stuff works.
Case: Define Mini
Parts: P8Z77-M Pro µATX, i5-3570K, STRIX-GTX960-DC2OC-4GD5, 8 GB G.Skill DDR3U, Xonar DX, WD B-G 1 TB, mx100 256 GB, RX-5300 PSU
Cooling: Noctua NH-U12P SE2 + Scythe SS PWM, 2x Noctua NF-P12
Extras: Eaton UPS, Dell 24" EIPS, MS Sculpt, Logitech G303, Synology DS213j 3+3 TB NAS

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