Kernel driver aquacomputer-d5next

Supported devices:

  • Aquacomputer D5 Next watercooling pump

Author: Aleksa Savic


This driver exposes hardware sensors of the Aquacomputer D5 Next watercooling pump, which communicates through a proprietary USB HID protocol.

Available sensors are pump and fan speed, power, voltage and current, as well as coolant temperature. Also available through debugfs are the serial number, firmware version and power-on count.

Attaching a fan is optional and allows it to be controlled using temperature curves directly from the pump. If it’s not connected, the fan-related sensors will report zeroes.

The pump can be configured either through software or via its physical interface. Configuring the pump through this driver is not implemented, as it seems to require sending it a complete configuration. That includes addressable RGB LEDs, for which there is no standard sysfs interface. Thus, that task is better suited for userspace tools.

Usage notes

The pump communicates via HID reports. The driver is loaded automatically by the kernel and supports hotswapping.

Sysfs entries

temp1_input Coolant temperature (in millidegrees Celsius)
fan1_input Pump speed (in RPM)
fan2_input Fan speed (in RPM)
power1_input Pump power (in micro Watts)
power2_input Fan power (in micro Watts)
in0_input Pump voltage (in milli Volts)
in1_input Fan voltage (in milli Volts)
in2_input +5V rail voltage (in milli Volts)
curr1_input Pump current (in milli Amperes)
curr2_input Fan current (in milli Amperes)

Debugfs entries

serial_number Serial number of the pump
firmware_version Version of installed firmware
power_cycles Count of how many times the pump was powered on