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#31
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"Queve Tientoo" wrote in message ... "Paul Hopwood" wrote in message ... | CrackerJack wrote: | | What exactly is the problem if too much cpu compound is put on the | core and it gets squashed out onto the surrounding area? | | Apart from looking messy, is there any real problem with this? | | You'll always get a little but if you are squeezing a lot out it | indicates you've applied far too much, meaning the layer of paste | between the processor die/heatspreader and heatsink is too thick. No matter how much you put on, the excess will get squeezed out buy the pressure from the HS hold down clip, your layer will always end up the same thickness. And it's so thick, there's no metal-metal contact. It's difficult enough to rub the goop away with a finger - try it for yourself. Try my method and watch your temps drop 5C ! I have removed several and the "layer" looks the same on both the carefully applied with no squizz-out and the sloppy with heavy squizz. | |
#32
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"Piotr Makley" wrote in message ... Conor wrote: Hmmm greasy finger goop, damn boy if you worked in my place and used your bare hands you'd be getting a **** round the back of your head... Why is that? Is it because you buy into the hype of the anti-static wristband manufacturers lies? And yes I know all about static damage... I don't think he is referring to damage by static. I think there is something "bad" about even a trace of grease like that from a finger. I don't know why this is though. The reason for that is that you have no idea what you're talking about. Until they dry out, vegemite and toothpaste work better than AS3 ! Can anyone enlighten me (gently)? |
#33
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"Piotr Makley" wrote in message ... "QBall" wrote: I have fine, non-greasy skin. I notice other people's mice and keyboards are always covered in a sort of greasy/grainy mix ..... disgusting. You could always wash your finger first, you know. Using an implement allows the introduction of coarse particulate matter (which will screw the interface) - which a finger can easily detect. Anyway, the addition of a microscopic quantity of skin oil makes no difference whatsoever. But why do people seem to worry about it? Simple. Because they spend too much time with their fingers stuck up their backsides ! |
#34
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#35
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#36
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"Queve Tientoo" wrote:
No matter how much you put on, the excess will get squeezed out buy the pressure from the HS hold down clip, your layer will always end up the same thickness. I have removed several and the "layer" looks the same on both the carefully applied with no squizz-out and the sloppy with heavy squizz. If too much is applied the excess won't be squeezed out. If it's applied properly their should be so little between the contact areas that it'll be barely visible when you remove the heatsink. -- iv Paul iv |
#38
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On Mon, 12 Apr 2004 09:26:44 +0000 (UTC), "QBall"
wrote: And it's so thick, there's no metal-metal contact. Metal to metal eh? Obviously you're only talking about CPUs with a heat spreader on them. It makes a much greater difference how thick the compound is when there's a spreader, because the retention force per sq. mm is so much lower. It's difficult enough to rub the goop away with a finger - try it for yourself. Well that's just a sign that your heatsink compound is too thick. If it can't even be rubbed with a finger it's not going to be getting into the crevasses very well either until it heats up, at which point it would also tend to ooze out from between the 'sink and cpu too. Try my method and watch your temps drop 5C ! On a P4, using very thick compound, I'll believe it makes a 5C difference. With compound of the proper consistency on an Athlon XP, maybe 1C if that, though it might take a couple thermal cycles for some of the excess to seep out. |
#39
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"Johannes H Andersen" wrote in message ... Matt wrote: Conor wrote: In article , says... CrackerJack wrote: What exactly is the problem if too much cpu compound is put on the core and it gets squashed out onto the surrounding area? Apart from looking messy, is there any real problem with this? I propose this answer: 1) If the compound is not too viscous, and the heatsink is clamped on with some force, and you apply enough compound, the thickness of the layer of compound does not depend on the amount applied, which is to say that the excess gets squeezed out. 2) Thermal compounds are not electrically conductive. 3) Some thermal compounds (notably those containing silver compounds) have capacitative properties that can be problemmatic if compound gets between the chip's leads. 4) If you use a compound that doesn't have the problemmatic capacitative properties and is not too viscous, in general it won't hurt to use too much. 1) WRONG 2) WRONG 3) If 3 is true then 2) is wrong. You've just proved that yourself. 4) WRONG. Your reply is practically content-free. Please start with this: In what way does 3 contradict 2? Apart from the above, the word you're looking for is 'dielectric'. Look up any elementary physics text book. Hehe ..... LOL The contemporary edukation system has a lot to answer for. Bad spelling is so freaking irritating. |
#40
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"kony" wrote in message ... On Mon, 12 Apr 2004 09:26:44 +0000 (UTC), "QBall" wrote: And it's so thick, there's no metal-metal contact. Metal to metal eh? Obviously you're only talking about CPUs with a heat spreader on them. It makes a much greater difference how thick the compound is when there's a spreader, because the retention force per sq. mm is so much lower. It's difficult enough to rub the goop away with a finger - try it for yourself. Well that's just a sign that your heatsink compound is too thick. Hehem .... I'm the guy who's been saying that it should be applied so it's invisible. Rubbing it off the point of invisibility takes a little application of effort and could no way be achieved by squeezing with a sink clip. You've gotten the complete wrong end of the stick, sir ! If it can't even be rubbed with a finger it's not going to be getting into the crevasses very well either until it heats up, This is a problem with crappy, coarse goops like Ceramique. For the CPU, a fine goop like AS3 should be used. at which point it would also tend to ooze out from between the 'sink and cpu too. Try my method and watch your temps drop 5C ! On a P4, using very thick compound, I'll believe it makes a 5C difference. With compound of the proper consistency on an Athlon XP, maybe 1C if that, though it might take a couple thermal cycles for some of the excess to seep out. |
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