Input lag desync PC and console

[bluca9211]

Hi guys, I’ve been dealing with these issues—desync and input lag—for about 3 years now, across both console and PC.
I’ve gone through 3 brand-new PCs and 3 monitors (two Samsung Odyssey G4s and an MSI G274QPX, all 240Hz), along with countless keyboards, mice, and mousepads. I even bought an Xbox Series X, but I experience the exact same sense of lag that I’ve always had on my PC.
Every mouse I’ve tried exhibits the same freezing, both on the desktop and in-game. In games, the sensitivity feels completely off; it’s as if there’s some kind of "gravity" affecting recoil control in FPS titles—making it impossible to adjust—which is something I never experienced before this problem started.
I’ve run various tests, though I’m not sure how clear it is in the videos I’ve posted: https://youtube.com/@salvocovato5309?si ... ceZD0bdH2u

https://drive.google.com/drive/folders/ ... YcrJklYnz-

[astroasis]

Only thing that worked for me was lifep04 battery, too much work trying to move house and hopefully find a place without the dirty electricity issue

[MK92]

So? 3 brand new PCs, 3 monitors, XBOX console, 5 mouses and keyboards, and everything is still the same even on console, and now what? You still don't know what is causing this? Maybe you should buy another PC then, and try another 5 mouses just to be 100% sure.

Stop with those irrelevant latency mon tests, the software cannot even detect error-correcting interruptions and delays, nothing on the software level will pick up this problem. And that's because it is NOT software or hardware problem, it is freaking power qualitiy issue...how many new PCs and mouses will you buy before accepting that?

Nothing can be done, either move to the area that isn't affected (yet), or try to re-wire the entire house next instead of buying new stuff over and over again...at least this way you have a good chance of getting rid of the problems, because simply buying another new PC would give you a grand total of 0% chance of fixing it.

[bluca9211]

Actually, no—I’ve given up at this point, and I don’t want to spend any more money on further tests. As a last resort, the only things I can think of are a complete rewiring of the electrical system or perhaps purchasing a double-conversion, pure sine wave UPS; beyond that, I wouldn’t know what else to do.

[bluca9211]

Only thing that worked for me was lifep04 battery, too much work trying to move house and hopefully find a place without the dirty electricity issue

Is this a UPS that uses lithium batteries?
Could you describe the problems you were experiencing and whether you managed to resolve them by using this device?

[astroasis]

Only thing that worked for me was lifep04 battery, too much work trying to move house and hopefully find a place without the dirty electricity issue

Is this a UPS that uses lithium batteries?
Could you describe the problems you were experiencing and whether you managed to resolve them by using this device?

Ecoflow delta classic 3, power bank that I charge from wall then unplug and use pc and monitor from it. My issues were blurry display, distorted graphics, bad audio, the desync144hz feeling like 75hz etc. Running pc from wall outlet feels terrible, but the power bank feels great

[unexpected8]

Changing the wires won't help; I even tried connecting the computer directly to the main circuit breaker using just a two-meter-long cable, while keeping all other breakers switched off—yet the result remained the same.
(I am referring, of course, to the home electrical distribution board.)

Even a UPS won't help you.
We all know it’s a complex electrical problem.
How can it be great if it’s not connected to a ground? Where will the electrical noise go?
Record a video of it while you’re playing; if you do that, I’ll buy one just like it.

[ApexLeg]

Have you tried different online accounts?

[bluca9211]

Changing the wires won't help; I even tried connecting the computer directly to the main circuit breaker using just a two-meter-long cable, while keeping all other breakers switched off—yet the result remained the same.
(I am referring, of course, to the home electrical distribution board.)

Even a UPS won't help you.
We all know it’s a complex electrical problem.
How can it be great if it’s not connected to a ground? Where will the electrical noise go?
Record a video of it while you’re playing; if you do that, I’ll buy one just like it.

I should look into the grounding, as that’s where my final lingering doubt lies. Beyond that, I’m not sure—everything was working fine for the three years leading up to this; I was even playing online using a copper-based (DSL/VDSL) connection with zero issues.
I was considering a double-conversion UPS, since it continuously cleans the power supply by filtering out surges and interference, providing "clean" energy. But first, I want to carry out some checks on the grounding.

[bluca9211]

Have you tried different online accounts?

Didn't you read what I said? I’ve gone through 3 new PCs:
1st: Ryzen 7 5800X3D, 3060 Ti
2nd: Ryzen 7 7800X3D, 4080 Super
3rd (the one I currently own): Ryzen 7 9800X3D, 5070 Ti
The problem first appeared about 3 years ago on the first PC, and it has persisted ever since—it even happens on consoles, too.