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I also tried a high-end online double-conversion UPS, but it had no effect.

I have an isolation transformer. Didn't change anything. Don't bother

MontyTheAverage wrote: ↑

14 Jul 2026, 13:25

I have an isolation transformer. Didn't change anything. Don't bother

im told that before but toroidal trans + ups with sine give some changes, which 99% of the members of this forum characterized as a "fix".

I bought a medical-grade MD-2000-U for $360, which was unusually cheap, I do not think it is currently available at that price. In my setup, it produced a very noticeable reduction in visual smearing.

However, I had to place it several meters away from the computer and connect it through a high-quality extension cord. Its toroidal transformer can radiate magnetic interference into nearby power supplies and other electrical equipment, and the manufacturer specifically recommends adequate separation. When I placed it right next to the PC, the result was worse rather than better.

edit: forgot to mention: this is the only direct electrical connection of my computer to the wall. Monitors, audio and ethernet are all pure fiber.

I tried an Eaton medical grade transformer, 3 times more expensive than yours, I placed it 2m away but it didn't change anything.

I only bought an cheap Isolation transformer, a DIY of someone from online market and it didn’t worked. I’m glad people tried expensive ones too and have the same result as mine. I guess you shouldn’t waste money on it or find somewhere accept returns