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post #21 of 36 (permalink) Old 04-04-2019, 10:32 AM
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Kryonaut is still a relatively new thermal paste isn't it? It will take a while before we know the long term reliability of it under a plethora of testing conditions, but after a month or two, seems weird.

As others also mentioned, I'm also using Arctic Cooling MX-2 and MX-4 (the difference between them is only 1-2C). I've had the same MX-2 applied on my i7-3820 for the past seven years without any problems and the temps are the same as seven years ago.

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post #22 of 36 (permalink) Old 04-04-2019, 10:47 AM
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Quote: Originally Posted by 8051 View Post
Quote: Originally Posted by skupples View Post
yep, MX4 is my go to... Mostly because it was one of the few companies selling large volume tubes 6+ years ago.

still using the same tube.

gpu's get painted w/ CLU, n everything else gets MX4.



Is CLU liquid metal? Do you ever have to re-paste that? If so, how often?
It is a liquid metal and don’t get it confused with liquid PRO, ultra is the only one to use from Cool Labs.

Idk, I change things often enough to never run into any issues. (Longest I’ve run it is 1-2 years)

You also become way less anal over time as you learn the hobby inside and out.


Solder pads are pretty cool too, just a PITA to implement. Most folks don’t like having to thermal limit the chip for reflow.

Someone will see a 1-2c change n freak out trying to point blame, all the while it was just 1-2c warmer in your office that day. 😛

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post #23 of 36 (permalink) Old 04-04-2019, 10:49 AM
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@Zfast4y0u @tostitobandito

Those temperature measurements are from somewhere deep inside the cores. I'm sure the surface of the die is not at that temperature, and if you use the IHS and do not do direct-die cooling, then the surface of the IHS is guaranteed to be a lot lower than what you see in HWINFO for the cores.

About how low the temperature on top of the IHS might be, on the websites for their older generations Intel showed a "T_case" temperature, for example here for the 3770k it was 67°C:

https://ark.intel.com/content/www/de...-3-90-ghz.html

That 67°C is the temperature you would expect the IHS to reach while you stress that 3770k enough that it will measure 105°C and keep it there through throttling.

I can't find this T_case stuff for the 9900k, that's why I had to use this old 3770k as the example.
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post #24 of 36 (permalink) Old 04-04-2019, 11:31 AM
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Quote: Originally Posted by deepor View Post
@Zfast4y0u @tostitobandito

Those temperature measurements are from somewhere deep inside the cores. I'm sure the surface of the die is not at that temperature, and if you use the IHS and do not do direct-die cooling, then the surface of the IHS is guaranteed to be a lot lower than what you see in HWINFO for the cores.

About how low the temperature on top of the IHS might be, on the websites for their older generations Intel showed a "T_case" temperature, for example here for the 3770k it was 67°C:

https://ark.intel.com/content/www/de...-3-90-ghz.html

That 67°C is the temperature you would expect the IHS to reach while you stress that 3770k enough that it will measure 105°C and keep it there through throttling.

I can't find this T_case stuff for the 9900k, that's why I had to use this old 3770k as the example.
Yeah that's a good point. You'd have to work pretty hard to get the IHS surface itself to 80C, especially considering your heatsink or cold plate is constantly cooling that surface (as well as the paste in between). Your CPU would probably have to be above tjmax for an extended period of time, or your cooler would have to be completely turned off.
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post #25 of 36 (permalink) Old 04-04-2019, 01:08 PM
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Quote: Originally Posted by ciarlatano View Post
I'm sure Ectotherm is another TIM simply rebranded. Any idea what it is? They were rebranding GC Extreme prior to the release of this.
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post #26 of 36 (permalink) Old 04-04-2019, 02:45 PM - Thread Starter
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On the topic on thermal paste longevity, does anyone know what's the shelf life of MX-4, mainly can it exceed 3 years? Noctua states that theirs is 2 years in the tube and 3 years between the CPU and heatsink, but I am curious if anyone has a 3 year old tube of any paste for that matter and how does it behave after all that time? I'm mainly asking as I am kinda fed up of buying TIM every so often and as a few PCs do go through my hands each month I'm looking into getting a 20g or larger tube of something that is as close to bulletproof as it can be.
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post #27 of 36 (permalink) Old 04-04-2019, 03:18 PM
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Quote: Originally Posted by skawster View Post
On the topic on thermal paste longevity, does anyone know what's the shelf life of MX-4, mainly can it exceed 3 years? Noctua states that theirs is 2 years in the tube and 3 years between the CPU and heatsink, but I am curious if anyone has a 3 year old tube of any paste for that matter and how does it behave after all that time? I'm mainly asking as I am kinda fed up of buying TIM every so often and as a few PCs do go through my hands each month I'm looking into getting a 20g or larger tube of something that is as close to bulletproof as it can be.
I Just checked a new 6 year old tube of MX-4.
The very edge of the paste was hardened (around the nozzle) but everything else was just fine. Not using it, though.

Also I've had no problems with Kryonaut. Yes it is a little hardened in the 9900K compared to brand new, but there was no difference between a 2 week old application and a 3 month old application. Temps may have worsened by 2C or so from completely fresh, but remained stable afterwards.

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post #28 of 36 (permalink) Old 04-04-2019, 04:39 PM
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Quote: Originally Posted by skawster View Post
On the topic on thermal paste longevity, does anyone know what's the shelf life of MX-4, mainly can it exceed 3 years? Noctua states that theirs is 2 years in the tube and 3 years between the CPU and heatsink, but I am curious if anyone has a 3 year old tube of any paste for that matter and how does it behave after all that time? I'm mainly asking as I am kinda fed up of buying TIM every so often and as a few PCs do go through my hands each month I'm looking into getting a 20g or larger tube of something that is as close to bulletproof as it can be.

8 years for both MX-2 and MX-4, stated on the package for several years now, just checked mine and cross checked with the 2019 editions on their site, it's still the same 8 years. Speaking of which, I just opened a still unopened tube of MX-2 I had lying around for ~3 years and it's fine. I have experience with MX-2 and MX-4 and they last for several years. The MX-2 in my i7-3820 has been there for 7 years and is still going strong. The AXP cooler (also made by Arctic) that I put on a GTX 480 in 2011 came pre-applied with MX-4 and I ran that card for almost 3 years without any temperature problems.

https://www.arctic.ac/eu_en/mx-2.html
https://www.arctic.ac/eu_en/mx-4.html

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post #29 of 36 (permalink) Old 04-04-2019, 05:48 PM
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post #30 of 36 (permalink) Old 04-04-2019, 07:23 PM
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Quote: Originally Posted by skupples View Post
It is a liquid metal and don’t get it confused with liquid PRO, ultra is the only one to use from Cool Labs.

Idk, I change things often enough to never run into any issues. (Longest I’ve run it is 1-2 years)

You also become way less anal over time as you learn the hobby inside and out.


Solder pads are pretty cool too, just a PITA to implement. Most folks don’t like having to thermal limit the chip for reflow.

Someone will see a 1-2c change n freak out trying to point blame, all the while it was just 1-2c warmer in your office that day. 😛
Why only ultra? I'm on my second tube of pro and have been exclusively using that for my delidded cpus since 2014. But if ultra is better I wouldn't mind switching. I just like pro because of how thin it is.

Also MX-4 always migrates for me. AS5 beats it without fail after a few months for me. Not at first, but as soon as the application of MX-4 turns to nothing but mineral oil in the interface area it falls back. Maybe I mount my coolers too tight?

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