i don't think battery vs. AC is a factor in my case

(with the exception being purely software/driver things like e.g. AC power mode triggering a higher performance mode on the GPU that enables different rendering features)

there's quite a few portable devices that have been noticeably even worse for me, such as the iPhone SE 2020, compared to an average modern desktop monitor or GPU (which FYI are also bad for me, but usually not to the extent of the SE)

BTW stuff like wireless is not an issue for me either — if i have a good screen, it's comfortable for me anywhere (or at least anywhere where the lighting is good) — having lots of WiFi devices has never made any of my "truly good" screens worse

Slender Unfortunately turning off dithering did not solve this problem for me.

I tested gtx1060, rtx2070s, 2080s, 3080, 3080ti with z390 / z690 PC's and 2k 165 / FHD 60hz monitors. And finally i am at z390 + 1060 + FHD 60

    Slender

    Hello,

    Do you think the following can be related to what you mention above?

    I have a "working" set up at my job, where I can work with barely any issues. I have tested many monitors at home with no success, dizziness etc.

    This week I took my monitor at work to my home, using the exact same laptop and Usb C cable to connect to the monitor… but I feel dizziness at home!!! how is that possible?

    The only differences of my home set up:

    • I use a different AC power cable to plug the monitor (I charge the laptop thought USB C)
    • The table I use is glass and has a metal frame. At work is a wooden table with metal legs.
    • I work close to the Router

    Does anyone has a possible explanation?

    Thanks,

        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 replied to this.

            Slender

            Thanks for your reply.

            I will try to find out about the grounding systems in both places and see if it is different.

            My desk at home has wheels so I sometimes work in different locations in the room, far from the wall and I get dizziness too.

            Would it help to have a grounding cable attached to the legs of the table?

                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.

                    Slender chinese emi tester like wt3121

                    what freq range do we need exactly to measure, is EMF meter is enough?

                    1. For example, PC monitor's fields, and what happends if I turn-on XMP profile in DDR4 (2133mhz, 3200mhz) - what freqs do I need to catch
                    2. Mobile phone, laptop, chargers - what freqs

                        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)

                          Slender
                          Hope you understand that the "chinese emi tester" you're using is a glorified AM radios (at best) which isn't calibrated for measuring the necessary range you're trying to target, spouting random values.
                          Take a look at this review for more information
                          You're supposed to use a proper spectrum analyzer from reputable brands such as LeCroy, Keysight, Rohde & Schwarz, Tektronix for this type of troubleshooting, especially when approaching the 2.4–5GHz range.

                              5 days later

                              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.

                                    Slender All components are new, retail os system.

                                    Interesting

                                    New build dont have issues for 100 prc?

                                        Slender

                                        I got a wt3121 and my monitor is 0 mV. Near the laptop it is in red but low amount. I noticed that some walls of the room and especially the ceiling can go up to 300mV

                                            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).

                                              CAP

                                              if your monitor has no emit, it means that it is grounded. Without connecting the laptop power, does it emit? Laptop shows some values when monitor (hdmi, monitor power) / laptop power disconnected?

                                              • CAP replied to this.

                                                  CAP I do not have an explanation, but I share a similar story. All the screens that started bothering me were used at home, specifically in one area where my desk is. At work I had far fewer issues, but when I took screens from work to try at home, then they started bothering me in both places. I do suspect some kind of electrical, grounding, or emission problem in that area at my home that made me sensitive to those screens.

                                                    Slender

                                                    I have done some more tester readings and now the screens shows some mV, depending on where I am located in the room but in the place where I work the monitor shows low activity, like <10 mV. If I move the computer table and I sit on the sofa the tester goes to >100 on the scren.

                                                    When I connect the monitor to the table PC, on the same table, the monitor show >40

                                                    The laptop show as well some some value both mV and uT.

                                                      dev