Reason most of you guys have input lag

[Racord]

You're missing one crucial point: after the isolation transformer, you won't have a phase and neutral; you'll have two phases floating relative to each other. To create a neutral, it is necessary to ground one of the phases, but not to the common house ground, which is full of interference, but to its own low-impedance ground. Also, after such a connection, a RCD is needed.

You can just use floating secondarys , power will be so clean grounded neutral is not necessary

If you have dedicated grounding , grounding screen between windings would be nice but even without it it gonna be superb

The transformer is great at cutting out external grid noise, but there is a theory that we might be missing another potential factor for input lag — the noise generated by the PC itself. The PSU and VRMs can create significant high-frequency noise, and the PSU's Y-capacitors dump it straight onto the chassis.

With a floating secondary, this HF noise simply has no low-impedance return path back to the transformer coil. Because of this, it's highly possible that the signal ground potential could start to ring, which might affect USB stability and potentially cause micro-jitter.

By grounding one leg of the secondary, we create a local TN-S and give the Y-capacitors a short return path. In theory, this allows the noise to close instantly inside the transformer instead of radiating through DisplayPort cables and shields. An interwinding shield is great for solving external interference, but it probably won't close the PSU's internal loop.

I know—and it is a fact—that when the PC is in the right location, grounding has no effect on the problem we are all experiencing. In the right location, the computer operates correctly whether a 2-wire or 3-wire connection is used. I have tested around 10 power supplies recently; I even completely removed the Y2 capacitors and fully rebuilt the input and output filters. I did everything possible to ensure the power supply wasn't the cause of this strange issue. The only fix right now is to find a location where your PC works perfectly—that could be just a meter away or a thousand kilometers away.

Removing the input Y-capacitors might not change much because that noise doesn't just vanish. Without those caps to filter it, all the high-frequency trash from the switching components gets dumped straight back into the power lines, essentially turning your power cords into massive antennas that radiate RFI directly into the room and your peripherals. I've actually tried desoldering them myself, and some residual voltage still remained on the chassis anyway. That's because Y-capacitors aren't just at the input; they are embedded deeper in the topology. Even if you pull the main ones, HF voltage still leaks onto the chassis through the bridging capacitors across the isolation barrier, standby transformer capacitance, and parasitic coupling from components to their heatsinks.

More importantly, the core objective here isn't just about grounding the PC chassis—that’s just an essential bonus. The real goal of this isolation transformer setup is to build a pristine, personal, low-impedance neutral locally. By establishing a clean local neutral reference completely decoupled from the grid's mess, we give whatever noise is left a stable, isolated path to close locally, preventing it from ringing across the signal ground.

If the issue really stems from the neutral line, this setup is pretty much the only way to fix it 100%. Of course, the true culprit could also be the surrounding radio frequency environment or DVB-T2 interference, but the only way to properly test and confirm that hypothesis is by completely eliminating all other power-grid factors first. Sorry if it looks like I’m writing this with AI, because I actually am, since my English isn't that strong

[1nputlag34]

You can just use floating secondarys , power will be so clean grounded neutral is not necessary

If you have dedicated grounding , grounding screen between windings would be nice but even without it it gonna be superb

The transformer is great at cutting out external grid noise, but there is a theory that we might be missing another potential factor for input lag — the noise generated by the PC itself. The PSU and VRMs can create significant high-frequency noise, and the PSU's Y-capacitors dump it straight onto the chassis.

With a floating secondary, this HF noise simply has no low-impedance return path back to the transformer coil. Because of this, it's highly possible that the signal ground potential could start to ring, which might affect USB stability and potentially cause micro-jitter.

By grounding one leg of the secondary, we create a local TN-S and give the Y-capacitors a short return path. In theory, this allows the noise to close instantly inside the transformer instead of radiating through DisplayPort cables and shields. An interwinding shield is great for solving external interference, but it probably won't close the PSU's internal loop.

I know—and it is a fact—that when the PC is in the right location, grounding has no effect on the problem we are all experiencing. In the right location, the computer operates correctly whether a 2-wire or 3-wire connection is used. I have tested around 10 power supplies recently; I even completely removed the Y2 capacitors and fully rebuilt the input and output filters. I did everything possible to ensure the power supply wasn't the cause of this strange issue. The only fix right now is to find a location where your PC works perfectly—that could be just a meter away or a thousand kilometers away.

Removing the input Y-capacitors might not change much because that noise doesn't just vanish. Without those caps to filter it, all the high-frequency trash from the switching components gets dumped straight back into the power lines, essentially turning your power cords into massive antennas that radiate RFI directly into the room and your peripherals. I've actually tried desoldering them myself, and some residual voltage still remained on the chassis anyway. That's because Y-capacitors aren't just at the input; they are embedded deeper in the topology. Even if you pull the main ones, HF voltage still leaks onto the chassis through the bridging capacitors across the isolation barrier, standby transformer capacitance, and parasitic coupling from components to their heatsinks.

More importantly, the core objective here isn't just about grounding the PC chassis—that’s just an essential bonus. The real goal of this isolation transformer setup is to build a pristine, personal, low-impedance neutral locally. By establishing a clean local neutral reference completely decoupled from the grid's mess, we give whatever noise is left a stable, isolated path to close locally, preventing it from ringing across the signal ground.

If the issue really stems from the neutral line, this setup is pretty much the only way to fix it 100%. Of course, the true culprit could also be the surrounding radio frequency environment or DVB-T2 interference, but the only way to properly test and confirm that hypothesis is by completely eliminating all other power-grid factors first. Sorry if it looks like I’m writing this with AI, because I actually am, since my English isn't that strong

I want try your methodd but i don't know what equipment to buy. What do you recommend?

[Racord]

The transformer is great at cutting out external grid noise, but there is a theory that we might be missing another potential factor for input lag — the noise generated by the PC itself. The PSU and VRMs can create significant high-frequency noise, and the PSU's Y-capacitors dump it straight onto the chassis.

With a floating secondary, this HF noise simply has no low-impedance return path back to the transformer coil. Because of this, it's highly possible that the signal ground potential could start to ring, which might affect USB stability and potentially cause micro-jitter.

By grounding one leg of the secondary, we create a local TN-S and give the Y-capacitors a short return path. In theory, this allows the noise to close instantly inside the transformer instead of radiating through DisplayPort cables and shields. An interwinding shield is great for solving external interference, but it probably won't close the PSU's internal loop.

I know—and it is a fact—that when the PC is in the right location, grounding has no effect on the problem we are all experiencing. In the right location, the computer operates correctly whether a 2-wire or 3-wire connection is used. I have tested around 10 power supplies recently; I even completely removed the Y2 capacitors and fully rebuilt the input and output filters. I did everything possible to ensure the power supply wasn't the cause of this strange issue. The only fix right now is to find a location where your PC works perfectly—that could be just a meter away or a thousand kilometers away.

Removing the input Y-capacitors might not change much because that noise doesn't just vanish. Without those caps to filter it, all the high-frequency trash from the switching components gets dumped straight back into the power lines, essentially turning your power cords into massive antennas that radiate RFI directly into the room and your peripherals. I've actually tried desoldering them myself, and some residual voltage still remained on the chassis anyway. That's because Y-capacitors aren't just at the input; they are embedded deeper in the topology. Even if you pull the main ones, HF voltage still leaks onto the chassis through the bridging capacitors across the isolation barrier, standby transformer capacitance, and parasitic coupling from components to their heatsinks.

More importantly, the core objective here isn't just about grounding the PC chassis—that’s just an essential bonus. The real goal of this isolation transformer setup is to build a pristine, personal, low-impedance neutral locally. By establishing a clean local neutral reference completely decoupled from the grid's mess, we give whatever noise is left a stable, isolated path to close locally, preventing it from ringing across the signal ground.

If the issue really stems from the neutral line, this setup is pretty much the only way to fix it 100%. Of course, the true culprit could also be the surrounding radio frequency environment or DVB-T2 interference, but the only way to properly test and confirm that hypothesis is by completely eliminating all other power-grid factors first. Sorry if it looks like I’m writing this with AI, because I actually am, since my English isn't that strong

I want try your methodd but i don't know what equipment to buy. What do you recommend?

Unfortunately, I can't really help you with specific gear recommendations. In my country, there is literally only one manufacturer making these kinds of devices for the consumer market, wages are low, and the borders are closed due to sanctions. You have a much wider selection over there. Plus, I haven't actually tried this method myself yet; as of right now, I don't even have grounding installed in my house.

[Racord]

I want try your methodd but i don't know what equipment to buy. What do you recommend?

Be sure to share the results if you give it a try. I’m very curious to see if there’s a positive outcome. Oh, and it would be ideal if you could get the ground resistance under 2 ohms.

Drew a diagram:

[1nputlag34]

I want try your methodd but i don't know what equipment to buy. What do you recommend?

Be sure to share the results if you give it a try. I’m very curious to see if there’s a positive outcome. Oh, and it would be ideal if you could get the ground resistance under 2 ohms.

Drew a diagram:

Thanks for your diagram. I'm on a TT system, so I already have a local ground I just need to measure its resistance. I'm going to buy the necessary tool. As for the isolation transformer, I found this one: https://adajusa.fr/fr/transformateurs-monophases/9536 -transformer-ultra-isolated-1000va-230-230vac-ip-20-8435532895367. html, but it requires a lot of wiring, which is a bit complicated since I have to ground the transformer’s chassis, ground the output of one of the transformer’s phases, and add a ground to the outlet connected to the transformer’s output so that makes three grounds. I don’t know how to do this since I only have one ground coming out of my outlet I’d need something like a grounded power strip.