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Delidding: a few observations..

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post #1 of 23 (permalink) Old 04-17-2019, 10:06 AM - Thread Starter
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Hi guys.

Thought I'd make a post about this to see if anyone else has had this issue. Basically, after delidding, liquid metal and reseal, my temps drop significantly as intended and works great for a few months, only for my temperature to significantly worsen with time to the point I'm as worse off then before a delid.

I bought a complete copper IHS replacement to see if things changed, and although it dropped my temps further, again I had to redo the delid as my temperatures steadily worsened over a few months.

At first glance i thought perhaps the IHS is moving on the board but as it's sealed, it shouldn't be. The only other explanation I can think of is maybe the liquid metal, over time, slowly seeps out from between the die and IHS, significantly worsening temperatures?

Has anyone else observed this issue with their delidded CPUs?

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post #2 of 23 (permalink) Old 04-17-2019, 10:22 AM
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I've ran delided CPUs for well over a year (and mllrkllr88 has three of them now ) without any issues of temps creeping up.

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post #3 of 23 (permalink) Old 04-17-2019, 10:57 AM
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I just sent mine out to be delidded, too scared to do it myself and this was my biggest concern.

I’ll definitely will be keeping an eye on this

After having to redo it did you notice how the LM looked, did it indicate anything that could point to the issue?

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post #4 of 23 (permalink) Old 04-17-2019, 11:00 AM
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I have been delidded going on a year now, no issues at all, temp hasn't changed one bit. I believe Gamers Nexus did a year long test on liquid metal and found to only lose like 1c in cooling.

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post #5 of 23 (permalink) Old 04-17-2019, 11:06 AM - Thread Starter
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Here's my delidded processor:

I did this about 3/4 months ago, and i've just had to do the delid again because temps started to creep up to Tjunction limits.

After the delid, i got my 20c headroom back.

I'm expecting to have to redo the delid again in another 2+ months down the line, this is now the third time i've done so.


I've been keeping a log of my temperatures during idle and stress testing in this machine, i do a test immediately after delidding then again with a few weeks intervals, jotting down ambient temps as i go. (Dust is also not a factor as the machine is often very clean between checks)

Temperatures noticably increase, under the same conditions, over time, to the point of tjunction which is pretty much were i was at before i delidded in the first place.

Re-doing the delid fixes this problem straight away.

Quote: Originally Posted by Shawnb99 View Post
I just sent mine out to be delidded, too scared to do it myself and this was my biggest concern.

I’ll definitely will be keeping an eye on this

After having to redo it did you notice how the LM looked, did it indicate anything that could point to the issue?
Nothing at all no. I do re-use the liquid metal by sucking it back into the syringe and i'm very meticulous as i undergo this whole delidding process.
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Last edited by Thingamajig; 04-17-2019 at 11:17 AM.
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post #6 of 23 (permalink) Old 04-17-2019, 11:34 AM - Thread Starter
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Sorry to double post but i think the questions i'll ask here are worthy of it:

With your applications of Liquid Metal, do you guys spread the TIM across the die in a thin, smooth coating? This is how i apply liquid metal. I also ensure it's on it thick enough so the surface of the TIM is smooth. No odd dimples or bumps on it's surface.

When i put the IHS on, i do it entirely in one motion; Drop it squarely in place on top, then put pressure on for the sealant to set (I use the delidding tool for this and leave it for an hour), avoiding at all costs moving it once the IHS has made contact with the die/LM. If i screw up and the IHS has already made contact with the die, i redo the entire process again.

Think i could be applying too much? not enough? I'm at a loss here. What i do know is, it's deffo the delid. I just can't decipher if it's my techinque, if i'm just unlucky or if this is actually a problem alot of us arn't aware of.

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Last edited by Thingamajig; 04-17-2019 at 11:42 AM.
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post #7 of 23 (permalink) Old 04-17-2019, 11:56 AM
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I don't see what TIM you're using.

I'd recommend changing it to CLU or Kryonaut.

oh... i see... You didn't state which, just that its LM.

You're re-using it? Maybe that's the problem? Maybe you got a bad batch?

Since already on LM... switch to a different brand of LM. I've been using Liquid ULTRA (not pro) for ages now, and never have this problem.

I'd love to delid my 9700k, specially now that you can get those fancy little full copper IHSs.
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post #8 of 23 (permalink) Old 04-17-2019, 12:21 PM - Thread Starter
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Quote: Originally Posted by skupples View Post
I don't see what TIM you're using.

I'd recommend changing it to CLU or Kryonaut.

oh... i see... You didn't state which, just that its LM.

You're re-using it? Maybe that's the problem? Maybe you got a bad batch?

Since already on LM... switch to a different brand of LM. I've been using Liquid ULTRA (not pro) for ages now, and never have this problem.

I'd love to delid my 9700k, specially now that you can get those fancy little full copper IHSs.
I use Thermal grizzly Liquid metal and Thermal Grizzly thermal paste. Paste for IHS>Heatsink, LM for Die>IHS

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post #9 of 23 (permalink) Old 04-17-2019, 12:28 PM
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Hi,
Didn't have my redo of a silicon lottery delid go south yet
Theirs lasted about 10 months before it fell off a cliff on quite a few cores though they leave the Intel sealant and use a boat load of LM to fill the void so it just dropped out eventually.

Not a huge deal heating gun and a couple razor blades to loosen and cut the silicone they used
Bummer was they used a lot of silicone so it was fun to get it loose and apart.


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post #10 of 23 (permalink) Old 04-17-2019, 12:49 PM
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I'd try Cool Labs Liquid ULTRA (not pro) or Kryonaut.

I only have experience with CLU, and I've never noticed any sort of perf. loss, up to two years.

hey you're right! Look at that... the stuff literally melted off to the bottom! That's crazy. I've never seen CLU do that.
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