Reason(s) of Eye Strain

CAP

Hi!

Since your devices work well in one place and poorly in another, this narrows the search to AC problems.

First: what kind of electrical system do you use at work? Is there grounding? What kind of system do you use at home? I mean TN, TT, IT systems.

Second: your laptop most likely does not have a grounding contact in the power supply, so it is grounded to the monitor, and if there is grounding at work, but not at home - this may explain.

Third: both the desk at work and the desk at home have a metal base. The desk at work may be far from the walls from which AC interference comes, and on the contrary, the desk at home may be close to the wall, behind which there is wiring.

I will explain why this is important:

The metal absorbs interference from the walls and then this radiation goes to the devices located on the table. Even if your devices are grounded, interference will still penetrate from the metal base into your devices. To fix this you need to ground your table: connect the metal leg of the table to the ground contact in the socet.

fourth: AC has harmonic distortion. Different networks have different harmonics at different frequencies, and no one knows yet which frequencies affect our heads. (presumably the strongest influence is the low frequencies 100-2000hz)

Perhaps the electricity at your work is cleaner than at home.

CAP

you need a cheap chinese emi tester like wt3121, if your monitor shows higher than >0mV, it means there is something wrong with the grounding.

simplex

It is necessary to distinguish between the interference (emi field) caused by AC and the frequencies that are in the emi field. External emi can be measured with a device such as wt3121 (as shown in the photos at the beginning of this thread).

frequencies can be measured with an oscilloscope.

What's the problem?

Even when your monitor will not emit any field (0mV), (at least that wt3121 sees), bad frequencies will still be emitted from your pc, monitor, walls of your house.

The AC emit itself will always be present, that's physics. Only harmonics within this field have an effect.

I don't know what frequencies exactly are projected when increasing the voltage of system components (cpu/ram/gpu)

qb74

yes i understand that. And yet it showed a problem. In my case the interference was breaking through to the pc from the metal table. And this is despite the fact that my pc was grounded. I still got 25-35 mV from the monitor screen and the pc. It was very interesting to discover this: I touched the pc case with my hand and the table leg with my foot and saw how the values ​​dropped to 0.

simplex
his build:
7600x
32 gb gskill cl28
klevv cras c930 m.2 1tb
gigabyte 4060 ti 8gb eagle
asus PRIME B650M-A AX II
antec c5 case white
cx750m 2024

All components are new, retail os system.

simplex

sorry i dont know about eye pain for him but he had problems with graphics, input lag, image jitter, blurry, desync.

Perhaps it helped that he reduced the system consumption by half, compared to the 14700k and 3080 he had before, with the same PSU wattage (750w).