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Toasty Intel Core i9-10900K hits 93 degrees Celsius...with a 240mm liquid cooler: beats the AMD Ryzen 9 3950X in single core, but at what price?

The Intel Core i9-10900K has 10 cores and 20 threads. (Image source: HD Tecnologia)
The Intel Core i9-10900K has 10 cores and 20 threads. (Image source: HD Tecnologia)
A Weibo user recently tested the Comet Lake S Intel Core i9-10900K with an AIO 240mm liquid cooling setup. The user found that, even under high-end cooling, temps soared as high as 93 degrees on Intel's latest flagship.
Arjun Krishna Lal,
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With its remarkably high 250W TDP, it was a given that the Intel Core i9-10900K would run hot and challenge cooling systems. However, a test by a Weibo user indicates that even high-end liquid-cooling setups are unable to properly cool Intel's monstrous 5.3 GHz flagship Comet Lake S CPU. 

The user ran AIDA64's FPU workload together with FurMark for 100 percent CPU utilization during the benchmark. This might seem extreme, but keep in mind that they're using a 240mm AIO liquid cooling setup. Comparable processors like the AMD Ryzen 9 3950X (which has 6 more physical cores and 12 more threads) don't break a sweat under similar cooling, delivering sub-80 degree temps, even when overclocked

Results were much poorer with the Intel Core i9-10900K: thermal throttling meant that even the stock 4.8 GHz all-core turbo resulted in temps as high as 93 degrees. 

Intel is keen to promote its Comet Lake S lineup, and the Intel Core i9-10900K in particular, as the fastest gaming CPUs on the market. However, it appears that users will have to invest substantially towards cooling these processors to get the most out of them. AMD's frugal 7nm chips, on the other hand, deliver over twice the performance per watt, making cooling a breeze, quite literally. 

Core i9-10900K temps peaked at an astonishing 93 degrees C, even under liquid cooling (Image source: Weibo via Hardware Times)
Core i9-10900K temps peaked at an astonishing 93 degrees C, even under liquid cooling (Image source: Weibo via Hardware Times)

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Arjun Krishna Lal
Arjun Krishna Lal - Tech Writer - 470 articles published on Notebookcheck since 2019
I've had a passion for PC gaming since 1996, when I watched my dad score frags in Quake as a 1 year-old. I've gone on to become a Penguin-published author and tech journalist. Apart from working as an editor at Notebookcheck, I write for outlets including TechSpot and Gamingbolt. I’m the Director of Content at Flying V Group, one of the top 5 digital marketing agencies in Orange County. When I'm not traveling the world, gathering stories for my next book, you can find me tinkering with my PC.
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2020 05 > Toasty Intel Core i9-10900K hits 93 degrees Celsius...with a 240mm liquid cooler: beats the AMD Ryzen 9 3950X in single core, but at what price?
Arjun Krishna Lal, 2020-05-12 (Update: 2020-05-12)