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The cooler I purchased came with a variable fan speed controller. How do I know what speed to run the fan at?

When you first install your new CPU cooler we recommend that you run its fan at full speed to ensure that everything is working properly and the PC boots successfully. Then you can turn the speed controller's knob down to its minimum setting and appreciate the difference in noise level! Most people prefer low noise rather than maximum cooling for everyday computing, so clearly it makes sense to turn the fan speed controller to its minimum setting and see how it goes.

If you are running your PC in a particularly hot environment, or if you are experiencing stability issues then try turning the speed up slightly for more cooling. Generally speaking, virtually all the coolers we sell will adequately cool any modern processor at their minimum fan speed setting. However, if you want to be 100% sure that your CPU is in no danger of overheating, then you can check its temperature in the BIOS setup (press Del or F2 etc. when you first switch your PC on, then look for the CPU temperature reading in "Hardware monitor" or "PC Health Status" option or similar).


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