Data/Feedback required. Please test/try something for me

[Hyote]

I used to have all my devices plugged into different outlets, but after trying this my monitor's image quality seems to have improved. The mouse feels more consistent as well but I wouldn't call it better, because I used to separate my cables and plug them into different outlets each, but this works as well.

Thanks! A couple more questions (which I've updated in my original post as well): Where (roughly) are you from? Does your version of the "3-prong" plug enforce polarity? Could you rotate the plug in the socket by 180°?

Also, do you know how your room is wired? Some regions of the world daisy-chain the outlets instead of running separate wires to them. In my case, I have a little distribution panel inside the wall in this room, and all outlets are on a separate wire run. However, it might be that your room gets one "main" wire run to an outlet straight from the breaker box and then just daisy-chains the other outlets. Do you happen to know what kind of installation is present?

Hungary
Polarity is not enforced
Yes, I can rotate the plug
I don't know almost anything about electricity but it's almost certain to be the way you mentioned straight from the breaker box.

[kriegsnake]

I wanted to check it and saw that I’m already using them in the same order as you mentioned. The single trick that helps me is connecting the extension cord to the first outlet in my house right under the circuit breakers in the hall.

[Cyanide_]

I've been having more luck, or at least had some (temporary) improvements, with plugging PC/monitor/router into the same "smart" power strip with EMI protection, or using (un)shielded ethernet cables and messing with them, or following N/L power plug order in power strip/outlet, than plugging devices in some special order in each outlet lol

[ChristophSmaul1337]

Hungary
Polarity is not enforced
Yes, I can rotate the plug

Thanks for that information. That's very helpful.

or following N/L power plug order in power strip/outlet

I've thought about this for a while now, and I can't make sense of how that would work out. There's countries with power plugs which always enforce polarity, like for example the North American NEMA 5-15 plugs/sockets. With that train of thought, nobody in the US or Canada would ever come across this problem, because their plugs would always be "rotated" in the correct direction. Same for example would be true in Australia, or any other country with these kind of plugs. In fact, when taking a look at the plugs & outlets from all over the world, the European SCHUKO style ones are the only ones remaining which don't enforce polarity. Which, in turn, would mean that only people from a few select EU countries would get problems. However, I'm pretty sure you can get these kind of issues in France, Belgiumm, the USA or in the UK just as much as in Germany, for example.

I guess there could be more to this than just "plug direction doesn't matter", but the only reason I know of why plugs are forced to be polarized in most electrical standards is purely for safety. Most appliances use single-pole switches, which means that any switch will only break the connection in one spot. If you have plugged the device in correctly, the switch breaks the live connection and, with the switch in the off position, the entire device is not energized. If you plug it in wrong, even with the switch turned off, the entire device would be energized.

Apart from the safety implications, I don't see how the operation of devices would be affected by a 180° shift in phase angle alone. Remember, we're dealing with AC power. However, I'm not an electrical engineer and there might be more stuff going on that I don't understand. I'd love to be corrected and/or taught new stuff.

[spkii]

Im with a https://www.amazon.es/Brennenstuhl-Prem ... r=8-6&th=1

With this setup on: 2 EMI Filter Greenwave-Computer-Display-Router-2 Emi filter Greenwave. (In that order)...

From Spain (230V, 3 pin on sockets). Tried with all software tweaks possibles, 2 diff computers, and a Power Station OffGrid (2300€ cost and 6 hours offgrid battery).. Nothing solved it.

This is at least the best setup i have tried... will update with your 1-Computer-2-Display-3-Router Setup you are telling here and will tell you if works.

[Hyote]

Im with a https://www.amazon.es/Brennenstuhl-Prem ... r=8-6&th=1

With this setup on: 2 EMI Filter Greenwave-Computer-Display-Router-2 Emi filter Greenwave. (In that order)...

From Spain (230V, 3 pin on sockets). Tried with all software tweaks possibles, 2 diff computers, and a Power Station OffGrid (2300€ cost and 6 hours offgrid battery).. Nothing solved it.

This is at least the best setup i have tried... will update with your 1-Computer-2-Display-3-Router Setup you are telling here and will tell you if works.

I bought that one because it was literally the only not too cheap looking one. It's okay but there is definitely not a difference between this one and the one I've been using for 20 years.

[Cyanide_]

Hungary
Polarity is not enforced
Yes, I can rotate the plug

Thanks for that information. That's very helpful.

or following N/L power plug order in power strip/outlet

I've thought about this for a while now, and I can't make sense of how that would work out. There's countries with power plugs which always enforce polarity, like for example the North American NEMA 5-15 plugs/sockets. With that train of thought, nobody in the US or Canada would ever come across this problem, because their plugs would always be "rotated" in the correct direction. Same for example would be true in Australia, or any other country with these kind of plugs. In fact, when taking a look at the plugs & outlets from all over the world, the European SCHUKO style ones are the only ones remaining which don't enforce polarity. Which, in turn, would mean that only people from a few select EU countries would get problems. However, I'm pretty sure you can get these kind of issues in France, Belgiumm, the USA or in the UK just as much as in Germany, for example.

I guess there could be more to this than just "plug direction doesn't matter", but the only reason I know of why plugs are forced to be polarized in most electrical standards is purely for safety. Most appliances use single-pole switches, which means that any switch will only break the connection in one spot. If you have plugged the device in correctly, the switch breaks the live connection and, with the switch in the off position, the entire device is not energized. If you plug it in wrong, even with the switch turned off, the entire device would be energized.

Apart from the safety implications, I don't see how the operation of devices would be affected by a 180° shift in phase angle alone. Remember, we're dealing with AC power. However, I'm not an electrical engineer and there might be more stuff going on that I don't understand. I'd love to be corrected and/or taught new stuff.

Yeah sry forgot to mention I'm from EU but you probably guessed it already haha. I've seen some people having issues with these gas boilers because they need a correct polarity and when you plug them upside down they won't even work. Wonder how many people have plugged their PCs and other stuff "upside down" and are suffering from any problems.
My "PC outlet" has in fact reversed polarity (L is on the left, N on the right), someone messed up while installing it, so I plugged my power strip plug upside down and replugged all stuff in "correct" way on strip and saw some improvement (not a fix, but still a small change).
Tried your suggestion, nothing happened, been shuffling these plugs multiple times in strip before with no luck. What actually helped before, is plugging the whole PC setup into other outlet, but in other corner of the room and moving PC there.

[spkii]

Its like EMI in the air or something… Does exist something to avoid this RFI EMI instead of EMI filters that are only for wired devices?

[Kipperii]

Did you keep the previously problematic PSU/PC to test this theory? Would love to hear your results.
Also i am going to test it tonight.

[Slender]

ok, you mean plug the pc into the extension cord in the first socket from it? What's the point? The extension cord is the same circuit as the sockets on the wall in a row. The difference can only be in the cross-section of the wiring. In problem areas, there will always be "noise" in the socket, either by the power supply or by the ferrite core that you connect to it. This current is in the neutral wire and has a frequency of 150 Hz.
Even if you reduce this noise to the lowest values, for example, with x2 capacitors, or toroidal coils, the noise of the ac / dc inverter of the pc will still come back and create a high impedance.
I can reduce 1850 mv in my socket to 25 mv, but when the power supply is on, the values ​​return to 1850.
Thank you for being with us even after solving the problem.