UPDATE 2 | Fixed input lag and floaty mouse with UPS

[jterri]

Yes, the lights work normally, but many of them get replaced after about a year and a half to two years. They often fail during summer when we travel—it seems like they absorb power surges or something like that, since all the appliances and air conditioners are turned off.

Yes, there are noises coming from inside my PC, and it seems like they are from the power supply capacitors. It’s great that your system works better at night. Sometimes I laugh when I read that most people’s situation improves at certain times or late at night—man, for me it’s a disaster all the time and completely unplayable

Goodness frickin gracious, at this point moving to a more modern house is the only way your issue will fix itself. I didn’t know the issue could even get that bad. I don’t have any of these issues at all except for that micro mouse jitter and the small keyboard delay that I mentioned before, but I live in the United States.

[MK92]

Yes, the lights work normally, but many of them get replaced after about a year and a half to two years. They often fail during summer when we travel—it seems like they absorb power surges or something like that, since all the appliances and air conditioners are turned off.

Yes, there are noises coming from inside my PC, and it seems like they are from the power supply capacitors. It’s great that your system works better at night. Sometimes I laugh when I read that most people’s situation improves at certain times or late at night—man, for me it’s a disaster all the time and completely unplayable

Well for me its no use anyway, I cannot use my PC at 1 AM and later when it become good since I have to wake up before 6 AM due to work.

And since your problems are 24/7 the same, that actually means that electricity might not be the cause, because the grid and shared neutrals definitely get less congested at night and it should improve at least a little bit.

Did you even try it on different PCs? You didn't mention this, maybe its actually just that, your PSU capacitors have dried off and cannot provide stable voltage to rails anymore, and then even a little bit of voltage fluctuations and EM noise from the socket causes problems because the voltage on 3.3V and 5V rails is unstable and dirty. If you haven't tried it with multiple PCs, then try some good quality ATX 3.1 PSU first (look for low ripple rating, low transient response, and 105 Japanese capacitors).

Goodness frickin gracious, at this point moving to a more modern house is the only way your issue will fix itself. I didn’t know the issue could even get that bad. I don’t have any of these issues at all except for that micro mouse jitter and the small keyboard delay that I mentioned before, but I live in the United States.

Even in new houses people are reporting those problems, it could also be on the grid level and transformer sub-stations, and nothing in your house. The funny thing is I tried my PC and monitor in some other ancient apartment from 1960 with original electrical installation (nothing was ever renovated, not even sockets - the fuse box in that apartment looks like something straight from WW2), without any grounding on any socket, and guess what everything worked perfectly there.

[Yazeedtt]

I tried another PC and had the same issue. I also have a PS5, and the problem still persists. Unfortunately, the house is new, but it seems the issue is from the transformer or the shared neutral wire, not the house itself. My power supply is excellent at 750W, and honestly I’m not considering replacing it because I’m sure it won’t solve the problem. What’s the point of replacing it and ignoring the monitor’s power supply? It’s possible that our issues are caused by the monitor and its high sensitivity to poor electricity or interference, which makes the experience feel like 50–60 Hz.

[Dusky]

I think there's way too many people who do not consider this.

[MK92]

I actually said this in another thread, monitors have no filters like PC PSU, they get direct dirty AC from the wall so yeah it could be this. But in my case its also frametime choppines, like the windows animations are slow and stuttery, even websites needs longer time to open like the website is proccesed only in parts instead of at once (don't know how to explain it exactly, but its not caused by internet speed, its processing problem), I don't think this can be caused by monitors, it could be 80% PC and 20% monitor.

[spkii]

I have the same symptoms as you (tested with a PS5, two computers, and more). I'm currently testing an OnFilter brand filter for differential and EMI noise, and I need to order an isolation transformer for common-mode noise. With those two, I should eliminate both types of mains noise. If the noise is coming from the building's ground, I'm going to try a high-quality DC blocker.

[astroasis]

imo theres zero chance its to do with your buildings wiring, i have the same issue in two different houses in the same town, im in the position to test a third house soon which is a bit further away. It seems to be that certain towns transformers just distribute the electricity in certain ways that make this issue appear, but in most other places it doesnt, i dont know the specific science behind it

[Yazeedtt]

I have the same symptoms as you (tested with a PS5, two computers, and more). I'm currently testing an OnFilter brand filter for differential and EMI noise, and I need to order an isolation transformer for common-mode noise. With those two, I should eliminate both types of mains noise. If the noise is coming from the building's ground, I'm going to try a high-quality DC blocker.

Let us know here if trying the filter or the isolation transformer gives satisfactory results.

[MK92]

imo theres zero chance its to do with your buildings wiring, i have the same issue in two different houses in the same town, im in the position to test a third house soon which is a bit further away. It seems to be that certain towns transformers just distribute the electricity in certain ways that make this issue appear, but in most other places it doesnt, i dont know the specific science behind it

I thought that at first too, but after doing research for multiple months I'm now 90% that the issue is indeed wiring and building related, not the grid. I mean if the grid would really be the cause, then the entire neighbourhoods of 20+ big apartment buildings on the same grid, with several thousands of people in just that area, would be affected, and there is no way there wouldn't be many reports and complaints about that and they would have to investigate and fix it.

[zen9292]

I tried every software/bios tweaks from every website imaginable, from xmp ram timings to disabling HPET, to editing registry for mouse responsiveness, I also got a static public IP and set NAT to Full Cone from CGNAT. While all these slightly change input, the core issue of floaty aim that delays before coming to a complete stop + enemy ferrari peeking in every comp game eg. Valorant and CS2. Hell, even trying to draw circles on the desktop was impossible as it would be so delayed it would draw ovals after 3-4 circles.

This issue is so hard to diagnose since there are so many PC components combinations from motherboard to CPU to GPU to RAM to PSU. Even down to cases with different screws and such.

Now my fix to my own PC configuration was when my fans rgb started to act strange, some just stopped working and went dark. I was still trying to find a fix for input lag, mouse delay in games during this time and put buying new case fans to later priority. So what I did was I unplugged the ARGB 5v cables (In my case, I had 2 cables) from the motherboard. I got no more rgb but low and behold, floaty mouse, laggy delayed windows and inputs all gone. With modern pc's everyone has gone crazy with lights and rgb fans and it seems like with my particular pc, Z490 board has an issue with the 2 ARGB 5v cables. Well these cables are notoriously bad, comes loose easily and doesn't sit snug.

TLDR: My fix to input lag and delay was to unplug all my ARGB 5v cables from my motherboard. Hope you guys try this out, if it doesn't work you can just simply plug it back