Great fan for reasonable price

Have the fan 3 times bought, 2 upstairs and 1 downstairs. The graphics card temperature dropped by 5 degrees and the fan turned up this 20% slower, the lower appears to be effective in any case. The upper lead excellently from the CPU's heat. Have all boil down to 100%, while these are indeed audible but fairly quiet and not disturbing ... only a slight murmur, but can also do this in other fan housing be. Peak power for 10 the piece :)