Noctua has released the NF-A6x25 5V fans. Unpacking the numbering system a bit, that means they are 60 mm fans that operate at 5 volts. They come as 3-wire voltage-controlled and 4-wire PWM fans that are 25 mm thick. Cute little ol’ things, you say? Well, as we see smaller and smaller form factors, this kind of fan should find great use. So let’s check out these little fans and see how they do.