![Does anyone have any idea why this error keeps occurring?! Can't read fan speed error code 999, I'm about to return the card, I've switched pcie slots on motherboard, I've changed risers, Does anyone have any idea why this error keeps occurring?! Can't read fan speed error code 999, I'm about to return the card, I've switched pcie slots on motherboard, I've changed risers,](https://i.redd.it/uiiisehfous61.jpg)
Does anyone have any idea why this error keeps occurring?! Can't read fan speed error code 999, I'm about to return the card, I've switched pcie slots on motherboard, I've changed risers,
![Reading RPM speed of 4Pin Fan from HP Blade Server - Motors, Mechanics, Power and CNC - Arduino Forum Reading RPM speed of 4Pin Fan from HP Blade Server - Motors, Mechanics, Power and CNC - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/e/f/4/ef4a445ca72afbb106ecc832a56e71775fe7d3fd.png)
Reading RPM speed of 4Pin Fan from HP Blade Server - Motors, Mechanics, Power and CNC - Arduino Forum
![Fan RPM With Internal Hall Effect Sensor and Arduino (Intro to Hardware Interrupt and LCD Display) | Hall effect, Arduino, Arduino motor control Fan RPM With Internal Hall Effect Sensor and Arduino (Intro to Hardware Interrupt and LCD Display) | Hall effect, Arduino, Arduino motor control](https://i.pinimg.com/originals/85/4f/54/854f547b7361cadc56bf48b1e11de764.jpg)
Fan RPM With Internal Hall Effect Sensor and Arduino (Intro to Hardware Interrupt and LCD Display) | Hall effect, Arduino, Arduino motor control
![arduino - how to read and control the speed of a 12V - four wire fan? - Electrical Engineering Stack Exchange arduino - how to read and control the speed of a 12V - four wire fan? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/T87he.png)