Yes, you can disable PCIe power by adjusting the BIOS settings or using manufacturer-specific controls.
Yes, you can disable PCIe power by adjusting the BIOS settings or using manufacturer-specific controls.
I understand the issue with the coil whine coming from the VRM and GPU. After testing various PSUs, GPUs, and motherboards without much improvement, it seems the problem might be related to the PCIe power delivery. You could try disabling the PCIe power source in your BIOS or system settings to see if that reduces the noise.
You might want to check the BIOS settings for various configurations. It could refer to overall power consumption across all PCIe lanes or just the specific slots. For the slots, adjusting their speeds in the BIOS or turning them off might help. Does your motherboard include a small spinning fan for the VRM? Swapping those fans can sometimes improve performance, though locating compatible parts can be challenging.
I haven't encountered a board with an option to disable power for the PCIe ports. If a replacement card is available, it's better to swap it out.
It's not a faulty unit but it produces some noise. In reality, it isn't worth the investment for a reasonably good board. I might reach out to the store to exchange it for something similar, though I'm unsure if that would work since my current board is also an Asrock. When I requested a replacement via RMA, they refused and suggested a different 1200 model instead—no luck. That's not feasible because I don't have an iGPU; only the GPU slot is affected. I don't want to reduce performance or disable anything; my goal is simply to cut power so my GPU receives full supply from the PSU. It lacks a fan.
The power supply voltage for the motherboard connects straight from the PSU via the 24-pin connector, with no modifications, and it doesn’t produce coil whine.
It seems the issue might be with the GPU itself (I've tested several PSU models). I don't want to go through another RMA; previously they gave me a refund, but it only covered a 1050 Ti, which isn't close to my 5500 XT. At least I managed to get another 5500 XT after hours of talking with them, but I'm not willing to take that chance. By the time I can afford a good GPU, I think I'll upgrade anyway.
Adjust the power allocation on the graphics card using MSI Afterburner or AMD's control panel. Tune the slider to -1% or -2%, or even raise it slightly. Coil whine may appear when the correct pulse frequency is achieved—possibly by altering the switching controller's duty cycle or modifying the inductor pulses, which can reduce the noise.