Chosen Solution
I have an Acer Predator Helios 300 PH315-52-75DE. The GPU fan, on the right side, is making a low pitched rattling noise. It’s very hard to describe, but it’s like a purring or growling. The fan propellor is metal not plastic for some reason, but I think that could be it. I tried using some foam tape for shock absorption, and that did help a bit. My only idea is to buy a replacement fan and swap the propellers. I can include some pictures if that would be helpful.
Heat has probably warped the fan which is plastic most of the time. You need a new one.
I’m having the same problem with a predator ph315-52. I describe the sound as C3 or 130hz pitch buzzing sound. This is the C just below middle C on a piano. It will change from C to C# and move around that area. I called Acer and they said to send it in.
Hello! I have a slightly older Acer Predator. Not sure about the sound you’re describing but personally, I had a loud annoying noise and it was from the removable 3rd fan. Try removing it and seeing if the noise goes away. Also, sometimes I hear a very low noise (from one of the remaining 2 fans) when the laptop is cold but once it warms up, it’s gone. Feels a little as if the fan is hitting something lightly as it turns. Hope this helps.
