My experience with all sorts of Problems regularly mentioned here.

[Kipperii]

In fact, based on the experience you mentioned here plus my own experience, I think that I have found two major causes of Desync, and one of them is the PSU problem. Because there are so many causes of Desync, I think replacing the PSU can fix the problem for a small number of people, but it is a solution worth trying. Buying a second-hand hw1200 is very cheap.

[F1zus]

One thing I find interesting is that almost all of the cases of input lag I've heard of have been with 850W power supplies... Is this a coincidence?

As mentioned in an eariler post, I have tested numerous different PSUs with different wattages. Depending on the system hooked up, either all PSUs (except the 1200W one) or none of them show problems. In my specific situation, that is. Again, it could be entirely different in another case.

you observed?
- not smooth image
- different game responsiveness during day and night
- poor hit registration
What of this?
Usually, when the electricity is bad, you will experience constant changes in game and mouse responsiveness every time you start your computer. During the day, the mouse feels heavy, and the model in the game is slow. At night the mouse feels fast and light.
After replacing the power supply, did these differences disappear?

[ChristophSmaul1337]

- not smooth image

Not sure about this, there was occasional stuttering, but these haven't gone away. I'm 99% sure that any stutter I get is caused by games being bad, as I mainly play CS2, which is poorly optimized, and Battlefield, which is also badly optimized from BF1 onwards. CS:GO, played with the legacy version, is buttery smooth without any hitching or stuttering, same goes for BF3.

- different game responsiveness during day and night

No. Everything always stayed the same, no matter the time of the day, or the weekday, or any other factor. Any change would have zero impact.

- poor hit registration

Yes, very much. Unbearable in Battlefield to the point where I can't even win a gunfight if I shoot somebody in the back, as that person can just turn around and laserbeam me within a few bullets, and also very much noticeable in CS, where shots would pass straight through players without dealing any damage. If I even saw the other player, because desync was by far the worst symptom.

Usually, when the electricity is bad, you will experience constant changes in game and mouse responsiveness every time you start your computer. During the day, the mouse feels heavy, and the model in the game is slow. At night the mouse feels fast and light.

Never noticed any abnormalities in the mouse movements, except one very recent incident. But that I will probably write off as some weird Windows bug thing, because even when the desync was the worst of the worst, the mouse felt good. No changes in mouse input happened ever. Same with keyboard. It always stayed the same. Even the desync and the hitreg problems never changed, no matter what I did or at what time I tried, it was absolutely horrendous and unbelieveably bad. It very much wasn't correlated with the time of the day.

After replacing the power supply, did these differences disappear?

There haven't been any changes or differences in the first place, but yes, with this new PSU everything feels exactly like I remember.

[Kipperii]

Can you provide gameplay footage after the power issue has been fixed?

[donktuman]

Okay guys ive bought the same PSU and it did not fix anything for me. dont waste your money on this. will be returning the PSU thank god for amazon return policies

[loltakoo]

Okay guys ive bought the same PSU and it did not fix anything for me. dont waste your money on this. will be returning the PSU thank god for amazon return policies

expected...

The OP's case is the most specific case ever seen because he solved it with this specific font model after having tested so many other good ones...

btw only buy this depending on the return policy, it makes absolutely no sense being a PSU

[donktuman]

Okay guys ive bought the same PSU and it did not fix anything for me. dont waste your money on this. will be returning the PSU thank god for amazon return policies

expected...

The OP's case is the most specific case ever seen because he solved it with this specific font model after having tested so many other good ones...

btw only buy this depending on the return policy, it makes absolutely no sense being a PSU

Yes I doubt OP will have it last long as well. Unless he has different issue to most of us.

[widow13]

Okay guys ive bought the same PSU and it did not fix anything for me. dont waste your money on this. will be returning the PSU thank god for amazon return policies

expected...

The OP's case is the most specific case ever seen because he solved it with this specific font model after having tested so many other good ones...

btw only buy this depending on the return policy, it makes absolutely no sense being a PSU

Yes I doubt OP will have it last long as well. Unless he has different issue to most of us.

What I've learnt over the years is that the issue might be the same but the solution usually isn't.
Personally I spent a lot of money to resolve it in total and ended up fixing it with a double conversion UPS.
Fixed the electrical panel,plugs,new house cabling for DSL,etc and the issue was still there, but the question is : Would UPS have fixed the issue if I had not done these repairs beforehand ? Maybe, but can't really tell for sure.

[ChristophSmaul1337]

Can you provide gameplay footage after the power issue has been fixed?

I'm reluctant about this, and I've said this multiple times before in this thread, if you don't believe me without looking at footage, then that's your good right. Once again, I'm not here to prove anything, as "proving" (as in: actual scientific proof) is way out of my abilities as a normal citizen without access to scientific measuring tools that for example labs would have access to. Video footage of before/after gameplay is not proof. But, as I'm not intending to cause any troube, I've already posted gameplay footage before in this thread. I think it's on page 5 or 6. You'll find it.

I'll put this here one last time. This thread could be marked as solved and be closed, but I thought it would be a good idea to keep it open and keep a little bit of a discussion going. Maybe this can get people insights they haven't thought of yet, or offer a different angle towards what could be the root cause of many problems. But, as I'm seeing that people aren't even believing that my problems are actually gone, I'm now close to DM'ing the chief to close this thread down alltogether.

If I'm being pressed to post video footage one more time, I'm messaging the chief so he can close this thread. I'm trying to answer anything that you might throw at me, but being met with genuine mistrust is not something I'm willing to put up with.

Okay guys ive bought the same PSU and it did not fix anything for me. dont waste your money on this. will be returning the PSU thank god for amazon return policies

That is expected and I'm happy to have put a disclaimer everywhere in this thread. Thank god you can return it without fees or any other hassle, but yeah, that's exactly what I've expected, too.

The OP's case is the most specific case ever seen because he solved it with this specific font model after having tested so many other good ones...

Yes I doubt OP will have it last long as well. Unless he has different issue to most of us.

Well, it has now been 4 weeks exactly that I've made the change, and the problem has never come back. I've played every single day, at every time of the day, and it hasn't appeared once. But, the instant that I swap in a 850W unit, or a 700W one, or a 550W one, it's immediately back to the same problems. I'm very confident that I've actually found a working "solution"/workaround for my specific problem, which likely is different from yours. And yes, for all I know, I could be the only person in this entire forum whose issues manifest themselves in this manner. If I knew exactly what was the cause for my problem, or anybody else's problems, I would obviously just tell you. I'm stating this once more, for everybody to understand:

I originally came here to seek help, to get some more inputs and ideas, and I've eventually figured out how to circumvent the problem. I'm not telling you that this is an universal fix. I'm not here to prove to you that I actually fixed the problems. If you decide to try my supposed workaround, do so at your own risk. I'm not telling you to try it, I advise against it. Every problem is different, and my solution likely won't fit your problem. Don't order new parts based on my observations. I lack the equipment to scientifically test for this.

Thank you for understanding. This is a public forum, and I think everybody reading this has had the experience before: You search on Google for a problem, you come across a thread that has the exact problem discussed, some people write something but the OP never answers back, and you never find out what the solution was. You want this thread to be that way? I don't, so I've provided you, and maybe lots of other people on the internet with something that works for me.

What I've learnt over the years is that the issue might be the same but the solution usually isn't.

Could very much be the case, as we're still in the dark about what is the actual cause of these problems. And until this discovery is made, we can only speculate.

[donktuman]

Did you get the smooth feeling instantly or did you adjust any settings etc? Do you use usb type c connector too?