UPDATE 2 | Fixed input lag and floaty mouse with UPS

[Terrykk]

Floaty mouse movement is caused by a bad neutral or phase wire I even tried playing without grounding 0% effect. No one should buy EMI filters they don't help. You need an active filter here, like a UPS. For now, there are no excellent passive filters. Even if they do help, they will eventually saturate just like the capacitors in a computer's power supply and then they will never work again. Or, for example, what do you do if the frequency shifts? Something that works at 50 MHz might not tomorrow because today's power supplies keep changing their switching frequency.

Thanks for the detailed info on the previous post about your UPS. So in short you believe the cause of mouse input lag and picture degradation is somewhat originating from the monitor itself, due to lacking a filter and PSU unlike computers?

However when people try to go the UPS route to fix this issue, they usually end up plugging all their equipment to it anyway, including the monitor - and many of them observe no change or improvements, why is that?

Feels like the problem may originate from different sources, affect equipment in different ways or be alleviated using methods that don’t work for others; in which case it would add an incredible amount of variables. Very discouraging.

[ablemor]

Yes, in my case, I believe the monitor is the culprit. And it doesn't matter what kind of monitor you have it’s always connected to your PC. You can use HDMI or DisplayPort cables it makes no difference. Even an optical cable doesn't help, and besides, those have chips at the ends that get quite hot, so don't buy those either; it's pointless.

In the past, I turned up the SSC in the monitor's service menu, and that did help the gameplay a little bit too. I am certain the problem is on the monitor's side it’s as if it creates a loop: the "dirty" power from outside comes in, the monitor doesn't filter it out, it pushes it into the graphics card, and then it affects the whole motherboard or something like that. I don't fully understand it yet myself, but this is the path I'm following, and this is what I want to figure out. And don't go replacing your computers let me tell you something: I have a 12-layer PCB motherboard, which theoretically should help a lot, but it still doesn't. So, how does that work? I had an expensive power supply that works in a completely different way, yet it didn't help either. I bought a UPS and plugged only the monitor into it, and suddenly I was hitting my shots well again. Isn't that interesting?

[ablemor]

I’ll tell you something else: when I used a USB-C cable connected to my motherboard and then to the monitor, that also helped. Isn't that interesting? Let’s say it wasn't as consistent as a UPS... so, the takeaway from the example above is that I wasn't using the graphics card port; it’s important that it’s USB-C, because in many cases, that is on a different ground on the motherboard. The motherboard’s native DisplayPort or HDMI port doesn't do anything.

[Terrykk]

Yes, in my case, I believe the monitor is the culprit. And it doesn't matter what kind of monitor you have it’s always connected to your PC. You can use HDMI or DisplayPort cables it makes no difference. Even an optical cable doesn't help, and besides, those have chips at the ends that get quite hot, so don't buy those either; it's pointless.

In the past, I turned up the SSC in the monitor's service menu, and that did help the gameplay a little bit too. I am certain the problem is on the monitor's side it’s as if it creates a loop: the "dirty" power from outside comes in, the monitor doesn't filter it out, it pushes it into the graphics card, and then it affects the whole motherboard or something like that. I don't fully understand it yet myself, but this is the path I'm following, and this is what I want to figure out. And don't go replacing your computers let me tell you something: I have a 12-layer PCB motherboard, which theoretically should help a lot, but it still doesn't. So, how does that work? I had an expensive power supply that works in a completely different way, yet it didn't help either. I bought a UPS and plugged only the monitor into it, and suddenly I was hitting my shots well again. Isn't that interesting?

What kind of issues did you have prior to hooking the UPS to your monitor?

If you remove the UPS from the equation, can you observe the issue coming back?

Have you ever tried recording the two states with an external camera?

Sometimes I’ll find myself trying to come to terms with whether I’m imagining things or if I’m genuinely experiencing this issue, but then once in a while the picture from my OLED display becomes so clear, crisp and detailed with little to no motion blur that I snap back into reality and tell myself that this is the baseline for how things should look consistently on a daily basis, but unfortunately 90% of the time they aren’t and things can regress from a match to another

[ablemor]

I haven't made a video yet, but yes, if I pull it off, the problem returns immediately. The mouse reacts differently, it doesn't track my micro-movements for example, I can't flick and I die faster, as if everyone else has a faster reaction time. It feels like my computer is slowing down due to all the error correction, although I think this error would exist even with a 10GHz processor.

[ablemor]

The problem is that the electrical grid is 'dirty.' If you’re lucky, the issue sometimes eases up, and sometimes it doesn't. It would cost the power companies a fortune to fix this, and we shouldn’t expect them to help just because someone wants to play games without dealing with floaty mouse movement.