Top positive review
90 people found this helpful
Good, but not for every use case - a myth about thermal paste
By Kane Zhang on Reviewed in the United States on July 6, 2024
Let me preface this whole things by saying that Kryonaut is a really good thermal paste for cpus. It helped decrease my tdie temps by a massive margin (over 5 degrees), and thermal conductivity is impressive while being easy to apply. But putting it on gpus... let's just say I bought this before I had actually done proper research because I had heard so much good about it. *sigh* time for the long boring essay... **TL;DR: pump out is bad for long term thermals and this has especially bad pump out. anything with IHS (cpu) gooood, anything without (delidded cpu, gpu, socs, laptops, etc.) baaad A lot of people tend to think thermal paste is either all the same or only look at conductivity. However, with this paste, I figured out the hard way that thermal paste is way more than heat dissapation. Pump out occurs through many repeated cycles of rapid heating and cooling and causes the thermal paste to dissipate outwards and leave little to no paste on the core, usually through a long time period (3-10 years, depending on quality). This is more prominent on gpus as those have no ihs and tend to heat and cool more violently than cpus do. Thicker, more viscous thermal pastes are less prone to this. Unfortunately, this thermal paste in particular has especially terrible pump out because it's thin and watery. It worked WONDERS on my cpu as I mentioned earlier. An already great temp of 65c or so fell to 55-60 while gaming in ambient 22-27c. No pump out issues and it stayed like this until I changed coolers. On my gpu, it worked well - at first. 55c with 8 degree delta between hot spot and core. It almost instantly (within a month or two) started to have bad deltas (meaning pump out was causing die to heat up in certain spots more than others). Delta was around 8c, then slowly rose to 15c+ (worst I saw was 20c) and core temp also rose from 55c to 60c to 65c. When I replaced it with a thicker, much more resiliant thermal paste (thermalright tfx), it has been consistently good at ~57-61c and 10-12c delta for the past 3 months. All in all, it's a great paste that has amazing thermal conductivity (although that standard is nonexistent). your cpu temps will drop if you are replacing old or otherwise low quality thermal paste. However, it's a lot of money for the amount of paste you get, and being the way it is, it is not designed for direct die contact, so bear that in mind. Be aware that different thermal pastes have different use cases, and this is not for gpus. If you want that from thermal grizzly, there is hydronaut and liquid metal (though I have not used either). I personally just recommend arctic mx5 and tfx and maybe noctua nt-h2.
Top critical review
2 people found this helpful
Extreme performance for a short term.
By Eric on Reviewed in the United States on May 12, 2025
So I bought this Thermal Paste about a month ago, and its been a dream. With Air cooling and an undervolt of -30 on my 9800x3D, I reached thermals of around 82 max on Cinebench r23. And it was a slow ramp to reach that temp. Most of the duration of the benchmark, it was actually mid to high 70s. The application is easy. It has a lower viscosity than other pastes i've used like the TF7 that comes packaged with most Thermalright cooling accessories. However, just recently, I noticed my temps SPIKE to 95c compiling shaders. I was soo confused by that, I thought maybe some software had reverted my bios settings for the cpu or that a fan stopped working. The temps I was getting in those same benchmarks were gone. Straight to 95c underload on cinebench. I reset my bios, reinstalled drivers, I reverted everything to their default settings. I was almost certain it was software related, like a bad sensor reading. I manually checked and even rearranged the cpu fans. I made sure the screws were tight on the cooler. Nothing was working. So I decided to repaste the CPU as a last measure, thinking surely it wasn't the paste. And to my grand surprise, the paste had moved completely from the heat points of the CPU lid to the outside. Luckily there's enough for two applications and after reapplying it, I got the thermal performance I had initially. To note, I didn't do any weird application of the paste. I did a pretty generous application of TP in a pea size slightly skewed from the middle towards the bottom for better coverage of the hotspots of the 9800x3D. Time will tell if it lasts longer than a month this time. But as for right now.... From the experience, this TP has AMAZING thermal performance. Better than any I had used before. BUT I cannot advise it for longevity. If it starts to go bad again, I will not buy Kryonaut again. I'd probably try something like Grizzly's phasechange pads or their duronaut.
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