Maker Girl USA DC Case Fan Brushless 120mm x 120mm x 25mm 12V Quiet Output 12025

hello fans uh hang on hello fans yes this video is about fans particularly uh this sort of fan these 120 millimeter square fans 12 centimeters that is uh this one's one inch thick so that's 25.4 millimeters this one's an inch and a half that's 38 millimeters and they're all different power ratings so this one is 2.7 amps and this one is just 0.8 amps now these are the four wire fans which have ground 12 volts and also a tacho signal and also a pwm input so that you can control the speed of the fan so these are computer case fans and but my interest in in them is more to do with cryptocurrency mining uh because these fans are used on the cryptocurrency miners so here's a cryptocurrency miner this is an antminer v9 this mines bitcoin using the shah 256 algorithm and these things get quite hot you can see there are lots of heat sinks in here this one's seen quite a bit of action and has a