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Timer event granularity is a big rabbit hole, and different motherboards and different OSes (Win10 vs Win11) use different defaults -- but higher timer resolution definitely improves latency in many games, as long as the higher timer resolution is not overloading the computer.

On one hand, high ...

since no one is answering i delete all bcdedit commands and delete islc and dpclat.exe.i dont know if it works, or if its placebo or not, but since no one proving or saying anything, i delete them both and return to default bcdedit.


I pretty much answered here:

Also, seems RTC can't have ...

You either didn't read my post or didn't understand it.
I explained there is a difference with timer=0,5000 in the Sleep value between 'bcdedit default' vs 'bcdedit /set useplatformtick yes' (this one is RTC).
If RTC were the timer being used by default, Sleep should have the same value but it's ...

w11 uses tsc + rtc tick by default but it work better then w10 (tsc + rtc tick).

Why do you think RTC is default? Do you have any source of information?
W10 before 2004 version, timer shows RTC=0,5/1 and TSC=0,496/0,996. W11 shows equal values.

I have W11, bcdedit by default with timer=1,0000 ...

RealNC, with my VG279QM (OSD overclock off) it used to change Hz to 144 sometimes with a reboot or when monitor came back from standby. I know this is something that happens on some monitors.
This was likely caused by Windows or monitor trying to read the EDID extension blocks in these situations ...

Genuine question.

While this latency measuring tool is amazing in itself, would the issue not then be that running this test on a system with inconsistent input and visual latency issues make the test itself null and void until it’s taken on a machine without those issues?

I am thinking that ...

I believe you. Some things might not be reflected in numbers but still have an effect.
Check out this topic and fine app:
Should you be worried about 1, 5, or 10 ms of input lag? Use Latency Split Test (LST) and find out!

Thanks for sharing. I gave it a try and guessed 12 out of 16 ...

I believe you. Some things might not be reflected in numbers but still have an effect.
Check out this topic and fine app:
Should you be worried about 1, 5, or 10 ms of input lag? Use Latency Split Test (LST) and find out!

Do you have problems with latency/performance by disabling them in power plan? Or just when you disable them in BIOS?
Does your CPU support C1E? If you don't have an option to disable it in BIOS you can do it with ThrottleStop.
What kind of latency values are you talking about and how did you ...

for some reason i get worse kernel timer latency with c-state off (z790).
im use enable c-state + set c0, it feel better and fix my kernel timer latency.

You can limit to C1 (not C1E) only since C0 locks the CPU frequency to its maximum and disables dynamic frequency scaling. Windows ...