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So what if thermal compound spreads?
Depends, depends on how much and the CPU. On the Intel, much less of a
problem (as long as it's not creeping around on to the underside!). On the AMD, much more problematic. The AMD core is *exposed*, and thus there are various "bridges" that surround it. The last thing you want to do is "short" one of those bridges because you got to sloppy w/ the thermal paste! But having too much paste indicates another problem. The paste is ONLY there to fill the microscopic imperfections between the mating surfaces. If those surfaces were perfect, you wouldn't even need the paste, in fact, it would *hinder* heat transfer. If you have so much paste on the mating surfaces that installation causes much of it to squeeze out, it indicates you have too much paste! Think of it this way, if we could use the paste to fill ONLY the imperfections, that would be ideal. Every bit of paste that *interferes* with contact between the CPU and heatsink is working NEGATIVELY against heat trasnfer. We're only interested in preventing VOIDS between the mating surfaces. Anything that's NOT filling the voids and is actually *preventing* surface to surface contact between the CPU and heatsink and thus *hindering* heat transfer, not helping. Bottomline: The less the better, ideally zero, but since this is an imperfect world, we need some, so use as little as possible. HTH Jim "CrackerJack" wrote in message ... 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? |
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No problem at all .... if you don't mind higher temps !
You need to maximise metal-metal contact. With a mirror-shine finish (above 1200 grit), you only need invisible amounts of goop. Enough to take off the shine, only. "CrackerJack" wrote in message ... 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? |
Conor wrote in message m...
In article , says... 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? Yes as it acts as an insulator. The idea of thermal compound is to fill the very small scratches on the faces. Actually the thermal paste is non-conductive. For maximum heat transfer from the core to the heatsink, the two metal pieces need to touch as much as possible. Hence, the addition on the paste fills in the imperfections. Other than being a mess, things should work just fine. |
"Rob Morley" wrote in message t... In article , "John" says... Conor wrote in message m... In article , says... 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? Yes as it acts as an insulator. The idea of thermal compound is to fill the very small scratches on the faces. Actually the thermal paste is non-conductive. Eh? You thought he meant thermally, we realised he meant electrically. |
In article , "QBall"
says... "Rob Morley" wrote in message t... In article , "John" says... Conor wrote in message m... In article , says... 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? Yes as it acts as an insulator. The idea of thermal compound is to fill the very small scratches on the faces. Actually the thermal paste is non-conductive. Eh? You thought he meant thermally, we realised he meant electrically. I realised he could have meant either, so asked for elaboration. Actually some thermal compund is electrically conductive too, so I think it was a dangerous statement to make. |
"Conor" wrote in message
... In article , says... 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? Yes as it acts as an insulator. But more conductive than air, which is why it is used. Alex |
Rob Morley wrote:
Yes as it acts as an insulator. The idea of thermal compound is to fill the very small scratches on the faces. Actually the thermal paste is non-conductive. Eh? You thought he meant thermally, we realised he meant electrically. I realised he could have meant either, so asked for elaboration. Actually some thermal compund is electrically conductive too, Which one? so I think it was a dangerous statement to make. |
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