thermal compound burn off?

[speeduk]

When I installed my new processor, I used the compound that came with the sk 7 heatsink. I spread a thin layer on the cpu as instructed (ive done it before too) but the temps seem to increase gradually over time.

I decided to use some arctic silver 3 compound and see if that helped, and when I removed the heat sink, there was no compound on the cpu! It must have burned off, thus leading to higher temperatures. The AS3 did reduce temps dramatically when I first put it on, but the temps are getting a bit higher all the time. First day I put it on it was idling at 43C and full load 48C. Today its just as cool as it was then and its idling at 45C and reaching 50C full load. Does the compound burn off in some way over time or did I not put enough compound on ???

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[pIII_Man]

Speeduk I don't think it is burning off...I beleive it is migrating (going from hot to cold). About a solution, I really don't know, make sure your heatsink mates well with your cpu and that the heatsink is flat on the cpu.

 

[speeduk]

Thanks for the reply. The AS3 has only been on the cpu a few days, their site says it can take upto 200hrs before the compound makes the best possible contact between the cpu and heatsink. I'll give it a few weeks and keep my eye on the temps. Does anyone here have experience with AS3? Does it lower temps after a few weeks or so?

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[speeduk]

ROFL no wonder my temps were a bit high, one of the cables that 2 of my fans ran off had come lose and they wasn't spinning lol. I took the side panel off and the temp went down to 40C. I fixed the loose cable and added another fan blowing air out above the 9700 as this runs hot. Now im getting 42 idle and 47 full load! BTW im using papst fans that run silent thats why i neva noticed!

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[Rubberbband]

Good to see that your problem (was it really a problem???) is solved lol. AS3 will gradually creep up in temperature (over a long period of time) because the heatsink forces it out. This is normal and most enthousiasts remove the CPU at least once in a three month period anyways.

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