Review on Fan for Arctic P14 PWM PST case, black by Wiktor Lisowicz ᠌

One of the package's five fans crackles audibly; the other two are significantly less noticeable but still audible in silence and at any speed. Its advantages include: -They don't look attractive and don't catch the eye; -They pull and purge well; -They are quiet up to 900 rpm; -They can be connected to one another, saving connectors on the motherboard; -They have a very low minimum rpm threshold (100-200); and -Good value for reasonably quiet and effective fans, particularly when compared to Noktua (3200/5pcs versus 2 for one fan). Pros below: -Bare equipment, merely regular silver screws for fans, no vibration cushions, extension cords, splitters, or anything else. -After 900-1000 rpm (with a limit of 1700), they start to buzz audibly (do not rustle, buzz), and after 1200 rpm the noise is intense.