machala
Since I used to service PCs for a lot of years, there is no way that I could remember all of the brands and models, but there has been a continuing trend: Intel-based motherboards are almost always painful, while AMD motherboards are capable of being comfortable. Within my own experiences, AMD motherboards (i.e. MSI and Biostar) of about 6+ years old are the most comfortable.
As examples, I had a nice little P-III PC given to me, but I could not endure using it because of the pain. Installing a lower Ghz CPU didn't help. Another high dollar Dell PC had been given to me, and I swapped the 3ghz CPU for a 2ghz CPU, but still had the pain.
On occassion, an office might have 4 to 6 computers that all have the same AMD hardware and the same software, but one of the computers emits a painful emission. The only way to alleviate the pain is to install another motherboard of the same brand and model.
The problems there were definitely the motherboards.
Little things like a dry or leaking capacitor can cause changes of frequency radiance, and by how the motherboard is designed, the circuitry might be fine for its intended purpose, but the layout of the circuit paths act as an emitting antenna (i.e. Intel).
On software-induced motherboard problems, a recent example is that of a PC that has the MSI-AM1i motherboard with the AMD 5350 CPU. With a Solus Linux OS installed on a hard drive, the computer is very comfortable to use. Disconnecting the Solus hard drive, and plugging-in a Windows 10 hard drive, the pain is almost instant.
Repeated tests have shown similar: Windows XP, Vista, 7, 8.1, and Linux hard drives can be plugged-in to a motherboard, and the test computer is comfortable to use. Inserting the Windows 10 hard drive always results in almost instant pain. The motherboard is definitely the problem, but the problem is caused by Windows 10.
In my own experience, I have witnessed the same effect on numerous computers.