Reason most of you guys have input lag

[spkii]

Please don’t move this thread to the EMI section. The root cause of most people’s input lag discussed here is this issue, and the EMI section gets very little visibility


Edit
Do not take action before reading 2nd post written by ChristophSmaul1337 , I was refering to system earthing type in my country +some eu countries only . I didnt checked other countries.
Still problem is the same solution will vary depending on earthing system your distrubtor uses , and you cant consume/use those hf , or you cant store it , it gotta go to earth or you gotta block via xformer




High frequency fields in neutral wont drain to earth , due to neutral ground bond is high resistance or absent . Also if you try to do bonding somewhere else other than panel vs , you will create a loop and make it worse.


What happens

Neutral carries high-frequency switching noise from other loads
This noise appears as common-mode voltage between line ,neutral and earth
PSU does not see a perfectly stable input reference anymore
Input emi filter capacitors couple this noise into the PSU primary
Some of that energy passes through parasitic capacitance of the transformer
Small high-frequency currents reach the secondary side
DC rails gain wideband ripple and phase noise


Why this creates lag / micro-jitter

Cpu gpu ram and chipset depend on stable clock timing obviously.
Clock generators use PLLs referenced to supply rails
Supply noise => phase noise => clock edge timing variation
Timing variation changes when operations complete
Frame delivery intervals become inconsistent
Input sampling intervals become inconsistent

We get , uneven frametime spacing , micro-stutter without FPS drop , inconsistent input response , unstable motion smoothness



How to fix it

Neutral to ground bond must have low impedance , obviously ground there must have low impedance too.

or

Isolation transformer with low interwinding capacitiy , but this is hard to do and some xformers sold as low cap are not low cap or they got leakage at core vs. , but emi approving labs vs must use them so you can ask them where they buy it and ask them to make one for you. First solution is easier but they will produce same result ( actually xformer will be better but neglibile kinda)

Hi, I've been using an isolation transformer for a few weeks now, and it's improved, but it's not perfect. There are still times of day when it malfunctions. My house has a two-phase system (phase-phase-ground, no neutral). It's an old house, so I also installed the transformer in my playroom (to create a phase-ground-neutral system), but it still has the usual problems, just a little better. What do you recommend I do in this case? Thanks in advance.

Isolation xformer needs to fit specifications I told

How About this? Its xformer like you said:
https://en.homecinesolutions.fr/p/28404 ... -max-black

[amorou]

Please don’t move this thread to the EMI section. The root cause of most people’s input lag discussed here is this issue, and the EMI section gets very little visibility


Edit
Do not take action before reading 2nd post written by ChristophSmaul1337 , I was refering to system earthing type in my country +some eu countries only . I didnt checked other countries.
Still problem is the same solution will vary depending on earthing system your distrubtor uses , and you cant consume/use those hf , or you cant store it , it gotta go to earth or you gotta block via xformer




High frequency fields in neutral wont drain to earth , due to neutral ground bond is high resistance or absent . Also if you try to do bonding somewhere else other than panel vs , you will create a loop and make it worse.


What happens

Neutral carries high-frequency switching noise from other loads
This noise appears as common-mode voltage between line ,neutral and earth
PSU does not see a perfectly stable input reference anymore
Input emi filter capacitors couple this noise into the PSU primary
Some of that energy passes through parasitic capacitance of the transformer
Small high-frequency currents reach the secondary side
DC rails gain wideband ripple and phase noise


Why this creates lag / micro-jitter

Cpu gpu ram and chipset depend on stable clock timing obviously.
Clock generators use PLLs referenced to supply rails
Supply noise => phase noise => clock edge timing variation
Timing variation changes when operations complete
Frame delivery intervals become inconsistent
Input sampling intervals become inconsistent

We get , uneven frametime spacing , micro-stutter without FPS drop , inconsistent input response , unstable motion smoothness



How to fix it

Neutral to ground bond must have low impedance , obviously ground there must have low impedance too.

or

Isolation transformer with low interwinding capacitiy , but this is hard to do and some xformers sold as low cap are not low cap or they got leakage at core vs. , but emi approving labs vs must use them so you can ask them where they buy it and ask them to make one for you. First solution is easier but they will produce same result ( actually xformer will be better but neglibile kinda)

Hi, I've been using an isolation transformer for a few weeks now, and it's improved, but it's not perfect. There are still times of day when it malfunctions. My house has a two-phase system (phase-phase-ground, no neutral). It's an old house, so I also installed the transformer in my playroom (to create a phase-ground-neutral system), but it still has the usual problems, just a little better. What do you recommend I do in this case? Thanks in advance.

Isolation xformer needs to fit specifications I told

How About this? Its xformer like you said:
https://en.homecinesolutions.fr/p/28404 ... -max-black

Its not at all , this will pass all the hf like a solid wire connection

[spkii]

Hi, I've been using an isolation transformer for a few weeks now, and it's improved, but it's not perfect. There are still times of day when it malfunctions. My house has a two-phase system (phase-phase-ground, no neutral). It's an old house, so I also installed the transformer in my playroom (to create a phase-ground-neutral system), but it still has the usual problems, just a little better. What do you recommend I do in this case? Thanks in advance.

Isolation xformer needs to fit specifications I told

How About this? Its xformer like you said:
https://en.homecinesolutions.fr/p/28404 ... -max-black

Its not at all , this will pass all the hf like a solid wire connection

It has an electrostatic shield inside that blocks HF, and it also acts as a passive low-pass filter