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3-5 degrees higher Temps due to scratched surface?

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post #1 of 42 (permalink) Old 09-13-2019, 09:05 AM - Thread Starter
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3-5 degrees higher Temps due to scratched surface?

Hi there,

I've re-attached my Noctua NH-U12a 3 times due to trying out several other new coolers and realized a temperature rise of 3-5 degrees celsius compared to the first application, even though I've re-seated the cooler again to make sure it wasn't a bad thermal paste application.

Before installing the cooler again, I've noticed scratches from the edges of the processor and a dent of the surface area (very small).

Could this lead to higher temps compared to my first application?

Last edited by Melodist; 09-13-2019 at 09:12 AM.
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post #2 of 42 (permalink) Old 09-13-2019, 09:15 AM
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Just to make sure, ambient temperature in your room and/or case has not changed in between each test? It is common to see air temperature increase in the case/room during stress testing (especially over long periods of time with power hungry loads like linpack/P95) and this can confuse you if you do not record the air temperature going into the cooler at the same time you take the CPU core temperature.
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post #3 of 42 (permalink) Old 09-13-2019, 09:26 AM - Thread Starter
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Quote: Originally Posted by shellashock View Post
Just to make sure, ambient temperature in your room and/or case has not changed in between each test? It is common to see air temperature increase in the case/room during stress testing (especially over long periods of time with power hungry loads like linpack/P95) and this can confuse you if you do not record the air temperature going into the cooler at the same time you take the CPU core temperature.
Yeah I've tested this thoroughly and the temps are worse from the getgo. Before I was between 89 and 91 package and now I'm at 91 to 94 package.

I've also noticed the IHS has scratches compared to before, even though I've only reinstalled the cooler several times, which might've come from removing the cooler.

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post #4 of 42 (permalink) Old 09-13-2019, 09:29 AM
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IMO, those tiny scratches would make a negligible difference in temperatures. Especially as thermal paste is supposed to fill these kinds of imperfections and improve conduction.

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post #5 of 42 (permalink) Old 09-13-2019, 09:41 AM - Thread Starter
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Quote: Originally Posted by Noxinite View Post
IMO, those tiny scratches would make a negligible difference in temperatures. Especially as thermal paste is supposed to fill these kinds of imperfections and improve conduction.
Probably me from twisting the cooler?

Or could they be existing marks, exposed by using 99.9% Isopropyl several times?

Last edited by Melodist; 09-13-2019 at 09:45 AM.
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post #6 of 42 (permalink) Old 09-13-2019, 10:38 AM - Thread Starter
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Quote: Originally Posted by Noxinite View Post
IMO, those tiny scratches would make a negligible difference in temperatures. Especially as thermal paste is supposed to fill these kinds of imperfections and improve conduction.
Has maybe the TIM solder cracked or something?
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post #7 of 42 (permalink) Old 09-13-2019, 10:45 AM
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Quote: Originally Posted by Melodist View Post
Has maybe the TIM solder cracked or something?
that seems unlikely, but if you're searching for reasons to delid

I don't see anything anywhere worthy of changing temps even 1c tbh. Did you bork the cooler? Is only one fan coming on? no fans coming on?

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post #8 of 42 (permalink) Old 09-13-2019, 10:51 AM - Thread Starter
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Quote: Originally Posted by skupples View Post
that seems unlikely, but if you're searching for reasons to delid

I don't see anything anywhere worthy of changing temps even 1c tbh. Did you bork the cooler? Is only one fan coming on? no fans coming on?
No no, everything is the same, exactly the same, that's why it is so odd, the cooler, compared to before, obviously has tons of scratches now on the surface, I guess that may be the cause?

That's before

https://www.overclock.net/forum/atta...295348&thumb=1

and that's after

https://www.overclock.net/forum/atta...295350&thumb=1

Could too much thermal paste cause this?
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Last edited by Melodist; 09-13-2019 at 10:54 AM.
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post #9 of 42 (permalink) Old 09-13-2019, 10:57 AM
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i use a scotch bright pad all the time on my coolers & cpus. no difference in temps.

delid time.

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post #10 of 42 (permalink) Old 09-13-2019, 11:09 AM
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I say cure time is the cause.

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