In my experiments, a 2U rack server with two E5-2450L through conversion of liabilities to bring in active cooling at keller-grade noise level, I have two of these fans used to cool the CPUs. Together with 80mm fans from the same manufacturer to replace the fan behind the backplane of the server was almost living room compatible. Since the power supply units of the server have been certified Platinum, the 40 mm fan of the power supplies do not matter. Unfortunately, at the current state of my still in flux conversion attempts, the capacity is not sufficient to keep at a full capacity of the system with Prime95 threads 32 the temperature of the CPU back to below 60 ° Celsius. Temperatures are unfortunately risen to 65 ° Celsius, even at twelve active threads, the temperature above 60 ° Celsius remains. I have these fans reluctantly Once replaced with other, higher rotating, although the theoretical capacity is sufficient, but most likely is the exhaust of the radiator of the front CPU too hot. Following the expansion, I have a fan outside the housing connected together with another 60 mm to a candidate Akasa fan control. Conclusion: This fan is at full speed, in contrast to other candidates barely noticeable, in particular, there is not the hated by me, penetrating whistle. Such a low noise level, I would never have expected from a 60 mm fan.
