Predator Helios 300 - GPU fan going from idle to 1,000 instantly, and then going back to idle

hmartinez

I purchased this laptop on January 2018 so it's about to be 2 years old. This started happening a few weeks ago. I would be using my laptop as I normally do, but the GPU fan would start making a loud noise. The laptop would first start vibrating and making noises from the fans side, and then the GPU fan would start making this sound, kinda like a lawnmower trying to start. If this would happen when I'm gaming I would probably think that it's somewhat normal, but this usually happens when I'm doing uni work (mostly using chrome and Excel). 

I already opened it up and cleaned all the dust from both fans (first time cleaning them) but the noises seem to be more constant now. Please take a look at how it sounds here, with PredatorSense in the screen: https://youtu.be/H_kLoa2T5ww

Product name: Predator G3-571

SGLtech

Yikes!  
There's something physically interfering with the fan blades majorly. 
Hopefully it's debris that can be removed, but you might need to replace a defective fan. 
The more it goes on, the more chance that the fan will be defective and needs replacement.   
I'd tend to this as a matter of urgency, because if the fan is not cooling your GPU properly, you could end up frying your GPU, and it gets a whole lot more expensive to fix.