Hello All!
Never posted on the forum before so bear with me.
I purchased new computer parts from SCAN on 03.04.2019 including Asus Maximus 11 Non-Wi-Fi motherboard. Soon after putting the system together I realised that there is auditable (electrical buzzing/ high pitch whistle) noise coming from the rear of the PC when using internet or downloading files (internet cable connection).
I did not worry about it too much thinking it must be a coil whine or a capacitor of sorts on the new board. However, after 7 days I have noticed that the high-pitched noise is coming from the case even without using internet. It first happened after about 2-3h gaming session when the system was idling. I started my investigation and localised the source to be somewhere around CPU and RAM area.
The specs of the machine are as follows:
Motherboard: Asus Maximus 11 Hero – tried changing C-states and turning off all power saving/control options in BIOS with no result, overclocking had no effect nor did XMP profiles.
CPU: i7-9700k – Cooler is Noctua NH-D15
RAM: 2x16 GB Corsair 3200Mhz LPX
PSU: Corsair RM750x – it is 6 months old and was used in my previous build with no issues. I also have Corsair RM1000 that I have tried with the new build and the noise was still present. I also tested different PSU cables with no improvement.
GPU: RTX 2070 Gigabyte Windforce – in my tests I removed the GPU and power cables. Noise still present.
Storage: Samsung 970 PRO NVMe M.2 512 GB
Fans: Noctua NF-A14
With no other ideas I had decided to contact ASUS who referred me back to SCAN for RMA. Here I must give credit to SCAN for extremely quick response and return process (I contacted scan 13 days after goods were delivered).
Here is where real problems have started:
SCAN tested the board and found no fault. I am not sure how I feel about this as the issue was there when I was using the board (I even recorded the sound that I am happy to link should someone be interested).
The biggest issue is that I removed the Serial Number Label from the back of the motherboard when inspecting the back of the computer (don’t ask why, I just thought that since the sticker was somewhere around the area that the sound was coming from it might have been related). It is important to note that the label had just a serial number on it without the crucial ‘warranty void if removed’ text. The Serial number is also on the box of the motherboard with the text that does say warranty void if removed - I did not touch that sticker