Review on CPU cooler be quiet! Dark Rock Slim, black by Wiktor wikliski ᠌

Rating 2 for the most part due to ignoring technical support. If they answered, then it would be 4. If they also suggested something adequate, then naturally 5, because. Otherwise, there are no complaints about the cooler at all. With its pros: Great cooler! The temperature of the Core i5-9500 under constant 100% load in a closed case does not rise above 60 degrees. At the same time, the increase in the number of revolutions of the cooler itself is completely inaudible (again, in a closed case). Got cons: The cooler starts normally when the PC is started, but when the OS is loaded, the number of revolutions starts to drop. In some cases, they go to zero and the CPU Fan Fail Warning is triggered, which is quite unpleasant at night in complete silence. With other coolers for 20 years, this problem has not arisen. Technical support through the form on the site has not responded for more than a month. The phone doesn't answer either.