Hello everyone,A few weeks ago I built my first gaming PC. When I ran it everything was working great, but the PSU was making a high pitched noise that got a bit quieter when I turned off my PC, but only really went away when I unplugged my PC completely. And the GPU was also making a loud coil whine. I thought the parts might be faulty, so I sent them back and ordered newer (even higher quality) PSU and GPU.

Now, after installing the new parts, the GPU has a slight coil whine, but it’s barely audible. However, the new PSU makes exactly the same high pitched noise as the old one. Now I am confused as to what could be causing this. I thought it might be my power strip but after getting a new one nothing has changed.

I would really appreciate any help or advice on how to solve this problem.

Edit: Here is the parts list:

CPU: AMD Ryzen 5 7600 3.8 GHz 6-Core Processor
CPU Cooler: Thermalright Peerless Assassin 120 SE 66.17 CFM CPU Cooler
Motherboard: Gigabyte B650 GAMING X AX ATX AM5 Motherboard
Memory: G.Skill Flare X5 32 GB (2 x 16 GB) DDR5-5600 CL30 Memory
Storage: Samsung 980 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
Video Card: PowerColor Hellhound OC Radeon RX 7800 XT 16 GB Video Card
Case: Montech AIR 903 BASE ATX Mid Tower Case
Power Supply: SeaSonic FOCUS GX-850 ATX 3.0 850 W 80+ Gold Certified Fully Modular ATX Power Supply