Chief Blur Buster wrote: ↑03 Nov 2017, 13:38
erobuR wrote:also i need to clarify again that, if i give my pc 208v instead of 220v (which should be normally) the feeling is much more better.
EDIT: Important Note: This reply only addresses 208 vs 220v weirdness
See subsequent posts (Glide, me) for cause of skewing.
There may be other placebos or other problems involved.
Very interesting!
Theory: Overvoltage + thermal throttling
Not for your monitor, but the rest of your system.
Although usually power-triggered problems is VERY rare, it's not unheard.
It's possible the 220V instead of 208V is creating a slightly higher voltage at the rails
--> 5.1V instead of 4.9V for the 5V rail
--> 3.4V instead of 3.2V for the 3.3V rail
Creating overheating + thermal throttling = lag.
That creates more heating & more thermal throttling, ruining feel, adding input lag in a weird "Rube Goldberg" this-then-that-happens effect. It very very rarely happens, but I've seen weirder things happen. It's like "one million in one" sometimes, the conditions need to be just about uncanny circumstances for this to happen.
Theory: Unusual noise in power
Also try relocating your computer to a different building. Does it disappear? If so, you might have an unusually intense RFI interference problem in your power. Intense RFI interference injects noise into your computer, which can be tripping lots of things up simultaneously - like bus errors, memory ECC, SATA retransmissions, and laggy error correction. Usually these are microsecond lags but noise-corruption on a hard disk bus can delay a hard disk by several milliseconds. Very dirty electric power can sometimes cascade unexpectedly to that sort of stuff. Very rare, but I've seen it happen (flawed power into multi-millisecond lag) -- usually a computer crashes with lots of power noise, but occasionally a computer will start to lag before it crashes thanks to error-correction delays.
Also, make sure your video cables are at least 1 foot away from power cables where possible, and never parallel to power cables. Use very well-shielded monitor cables. Interference from power can leak into cables via multiple means.
Theory: Ground loop problem
Also, get your electricity outlet tested by an electrician. Tell them you might have a "
ground loop" problem. That causes problems for some 'sensitive' monitors or computers, since it can inject literally over 1,000x more "electrical noise" into your computer, overwhelming its noise-rejection, inserting corruption everywhere that causes a computer to crash or cause weird things (like video cable problems or a hard disk slowdown from error correction, or DSL modem retransmission retries, or a thermal throttling, etc).
Possible Solutions
Catch-all prescriptions:
(1) A really, really very good mains power filter, in case you're getting an inordinately unusual amount of RFI. Your power might be, like, 100 times "dirtier" than mine (because of a factory nearby or 1920s electric motors in an old house) -- tripping your monitor's electronics badly. A fix will be one of those expensive "$200" power bars with 4-star or 5-star Amazon reviews. That might actually fix things for you.
(2) New power supply (or maybe warranty claim). Something _really_ good true "90-260VAC" true universal with really good electronics for great DC at any mains voltage that also _really_ rejects noise. A lot of 80PLUS PLATINUM units will usually be the "pretty good stuff" your PC likes. But no guarantee.
Either (1) or (2) or both may be needed.
Does your BIOS have a voltage readout screen? Take a smartphone photograph of that screen at 208V and 220V. Compare the two. If you're getting overvoltage while connected to 220V, then that's your possible problem -- if it's out-of-spec then you may try a warranty claim -- the photograph is your proof to submit to the power supply manufacturer.
I'm spraying possible solutions, but basically I've narrowed this down to three targets:
--> Use a expensive power supply filter/isolator -- one of those "super duper expensive cinderblock-sized power bars" type things
--> Use a really good computer power supply (if the computer is also having some problems too)
--> Get your electricity tested and fixed
There is an element of partial false positives/false reports (e.g. NOT all of them are actually problems caused by power) but your situation definitely shows at least 1 weird actual problem that may actually be caused by power issues, so it's worth investigation.
EDIT: Important Note: This reply only addresses 208 vs 220v weirdness
See subsequent posts (Glide, me) for cause of skewing.
There may be other placebos or other problems involved.