ElmorLabs EFC-X9 (Easy Fan Controller for 9 fans)


Out of stock

SKU: EFC-X9 Category:


Note: 2.4″ display sold separately here

2022-12-14: 2.4″ OLED is now included with this product

The original EFC has evolved to a version with higher power and versatility. It now supports up to nine independent PWM fans and can supply 4.5A per header (resettable fuses) or a total max of 20A (hard fused). There are two external temperature sensor connectors (sensor cables included) plus an on-board ambient temperature and humidity sensor. It can be software controlled and monitored using the included USB cable. Both ElmorLabs software and support for writing your own code is supported, commands include reading sensor data, adjusting behavior, fan duty and display. Datasheet containing details will be released shortly.

The 2.4″ OLED provides a GUI for autonomous operation. Two profiles are supported in firmware, with temperature (TS1/2/AMbient), fixed or EXT_FAN modes. Easily switch between profiles by long-pressing the “+” button.

Default profile 1:

  • 50% fan speed
  • If TS1/TS2 are connected, 20% duty at 25 C linearly scaled to 100% duty at 40C
  • If EXT_FAN cable is connected, mimic the PWM signal (limit 20% – 100%)

Default profile 2:

  • 100% fan speed


  • 1x ElmorLabs EFC-X9 (circuit board)
  • 1x OLED 2.4″ White
  • 2x Thermistor cables 1 m (flat tip)
  • 1x EXT_FAN control cable 1m
  • 1x OLED extension cable 50cm
  • 1x USB 2.0 Type-A to Type-C cable 1 m
  • 1x USB 2.0 Internal 5-pin USB 2.0 to Type-C cable 50cm
  • Acrylic case (bottom, top without OLED, top with OLED, silicone feet, mounting equipment)
  • 1x Double-sided tape 100 x 40 x 3 mm (attached to the back of the PCB or acrylic case)


  • 9x 4-pin PWM fan headers (FAN1-9), 4.5A per header
  • 2x thermistor cable headers (TS1-2), XH 2-pin (10kohm B25/50=3950)
  • 1x on-board temperature and humidity sensor
  • 1x PCI-E 6-pin power connector (20A input fused)
  • Output power max 240W (20A @ 12V), per channel 54W (4.5A @ 12V)
  • Dimensions 140.0 x 56.8 x 1.6 mm
  • Mounting hole dimensions 133.4 x 40.2 mm M3 (offset 3.2mm from edge)