10/12/2026
When we tested Noctua’s first 240mm liquid cooler against our previous Asetek OEM unit, the initial results were substantial enough that we reran the tests.
On our Ryzen 9 9950X test system, the hottest CPU core reached 96°C with the Asetek cooler and 86°C with the Noctua during our combined CPU and GPU stress test.
The repeat testing added important context: the Noctua briefly peaked at 91°C before settling back to 86°C. Across the evaluation, cooling improvements ranged from 3–10°C.
Then we moved Noctua’s upgraded fans onto the Asetek radiator. Temperatures still peaked at 96°C, suggesting the fans alone weren’t responsible for the bulk of the improvement.
A good first result is interesting. Checking it is the part that matters.
Patrick Eaton walks through the testing, pump-noise observations, and qualification process in our latest article.
Read the full evaluation:
https://www.pugetsystems.com/labs/articles/noctuas-debut-240mm-aio-cooler-impresses/