Used with i9 9900k. The processor is locked at a frequency of 4.7 GHz for all cores, turbo boost is disabled, underfrequency when working with avx instructions is disabled. Slightly reduced voltage. With this LSS, CPU temperatures do not exceed 85 degrees in the prime95 stress test with avx instructions enabled. In a real load, the temperature is less. The test was carried out with standard fans. Later, the regular ones were replaced by Enermax D. F. Pressure (up to 2022 rpm and 85 CFM airflow). The backplate broke already on the second installation of this LSS. I didn’t calculate the effort, I tightened the bolt too much and this piece of plastic simply burst in one of the beams. I wrote to the technical support of Alfacul, in parallel I ordered a metal one for Ali. From technical support came the answer that they knew about the problem and sent a new one. Came the same, plastic, now lies in the box, since iron is more reliable.
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