This new PC is producing a noticeable vibrating noise.
This new PC is producing a noticeable vibrating noise.
Hello everyone, I’m reaching out for some advice. I recently assembled a new PC and installed a 9800x3D B850 Ripdite Wifi G.skill 6000 CL30 case from Fractal North XL. The main issue is the pulsating humming noise that occurs mainly during idle. I found a link to the AIO pump here: https://1drv.ms/f/c/43d48829b41b2bd7/EoR...w?e=bjpUfV.
The sound isn’t steady—it sometimes speeds up and slows down, which is really bothersome. No matter the fan curve I set (higher, lower, silent, custom PWM), the humming persists. I checked every part of the system, tried moving components around, even rotating the radiator to see if it helped, but nothing worked. I also disabled all other fans and still had the noise.
I suspect the problem might be with the AIO or CPU. The pump seems fine since it’s been almost three years, and it works perfectly without any issues. I’m using a CPU without a UV package, no PBO enabled, and idle temps are around 41°C. Cinebench shows all cores at about 71°, which is good.
When the humming stops, it happens when the core clock stabilizes (see attached photo). I was downloading a game from Steam, and during that time the CPU speed was steady—around 52°C with no noise. After finishing the download, the CPU core clock spiked again, temperature dropped to 41°C, and the humming returned.
Could it be that the pump speed is stable when the CPU is idle, but changes when the system loads? Or is there another source of vibration? Replacing the AIO might help, but I’d like some guidance before doing that. Any suggestions would be greatly appreciated!
It's quite unusual. A rhythmic noise can arise when two sounds with slightly different frequencies interact—like fans spinning at 120Hz and 122Hz producing a pulsing effect at 2Hz. Still, the AIO pump might generate this sound independently. If connected to a PWM-controlled header, it could create fluctuating volume changes depending on load. Ensure the pump is plugged into the correct header (manufacturer specifies fan or pump type) and the proper control method (full speed, voltage, or PWM). Check the BIOS settings to confirm the mode used for the pump. That should clarify things and help you succeed!