From what I can tell, the reason the minimum is 200 is because most fans don't operate below 250-300 rpm. ASUS Fan Xpert 3 is bundled with ASUS AI Suite 3 motherboard control ASUS motherboard owners can use this product specifically built with their system in mind.I'm pretty sure that's a monitor, and tells you when the fans go below that, kind of like a warning. In conclusion, the ASUS Fan Xpert 3 is a great utility for ASUS motherboard owners and can extend the life of your products saving you both time and money. Dual Intelligent Processors XX, Ai Charger+, EZ Update, USB 3.0 Boost, USB 3.1 Boost, USB Charger+, Wi-Fi Engine, Network iControl, USB BIOS Flashback, Wi-Fi GO!, Remote GO!, DIGI+Power Control, EPU(Energy Processing Unit), Fan Xpert 3, TPU (Turbo Progress Unit), Wi-Fi Engine, System Information, Key Express, Turbo APP, and Turbo Lan are all provided in the ASUS AI Suite 3.The software suite is a Windows compatible program meaning you can start it up and any time and make adjustments, rather than have to do it all from the boot environment (BIOS/UEFI).This allows the user to avoid unwanted fan speed fluctuations due to a control state known as Temperature Hysteresis. There is also a Fan Spin Up Time and a Fan Spin Down Time control.

This allows the user to define the 'RPM for Power Voltage %' which gives maximum control over the system. Features both 'Smart Mode' as well as 'Fixed RPM (Revolutions Per Minute) mode to allow full control over the system.This results in a fan that makes less noise and extends life. Depending on the preset modes which the user has full control over, you can have the case intelligently alter the speed of the fans when lower performance is detected, or during certain times.ASUS Fan Xpert 3 also supports a dual PWM (Pulse Width Modulation) / DC (Direct Current) mode for both the CPU and case housing fans.The utility is provided with the purchase of your ASUS motherboard, or you can download them from '' by simply providing your specific model. It is a feature of the ASUS AI Suite 3 which provides a set of utilities for optimal tweaking and monitoring of your ASUS motherboard. Please note, ASUS Fan Xpert is not a stand-alone product.

Ai suite 3 fan control