Скрытые параметры Биоса - Tweak

Over the course of 3 months I have been studying the hidden BIOS parameters available to me (on an Intel-based system).
I want to share information that may help someone with system input lag.
This article is intended for people who have at least once tuned a BIOS thoroughly. There will be no basic RAM settings, nor a guide on CPU overclocking/undervolting, etc., etc.

(From this moment on, I take no responsibility for the consequences of your actions.)

Guide on how to access hidden BIOS settings.

Not all BIOS parameters can be changed inside the BIOS itself. That is why we will use the Scewin program, which allows full export/import of the BIOS configuration.

I use this version.
Unpack it into a folder, run Export.bat.
Then a CMD window will appear, and the following should be written in it:

WARNING: Duplicate questions found. Only one question will be enabled in the script.
Script file exported successfully.

D:\Scewin>pause
Press any key to continue . . .

If an error occurs, or the text file BIOSSettings.txt is empty – download a different version of Scewin and try again.

After a successful Export, a file named BIOSSettings.txt should appear, which already contains all the BIOS settings of your system that can be changed at your discretion.

Simply move the asterisk (*) from one item to another.

Then Import.bat, restart the PC. The parameter is applied.

What pitfalls may appear?

I want to point out that not everyone may get a change, or on the contrary, there will be a change, but what kind I cannot say.

I do not guarantee that the parameter I recommend, which in my case gives a noticeable positive effect, will give you the same effect. It may give none at all, or give an effect, but not a positive one – only negative.

Or else… it will give both a positive and a negative effect. For example, a boost to the mouse but a downside in desync. I think I explained clearly. In most cases you can go by my recommendation.

Hidden parameters.

Interrupt Redirection Mode

Fixed Priority -> PAIR with Round Robin

Comment: By changing this parameter, interrupt handling conditions are processed differently. Round Robin distributes interrupts across all cores, making the system more responsive.
The mouse becomes faster, lighter, more precise.

PCI Express Clock Gating

Enabled -> Disabled

Comment: Disabling this parameter prevents the PCIe slot from entering a power-saving mode. In other words, the graphics card won’t “jump” from Gen1 (Gen2) -> Gen3, causing micro-freezes/underloads. It is best combined with ASPM disabled.

ASPM Native

Auto -> Disabled

Comment: It is not always possible to completely disable ASPM in the BIOS. Even with ASPM fully disabled, ASPM Native may still remain in Auto. I recommend completely disabling ASPM. Gives a boost to the mouse, smoothness, FPS.

PCIe-USB Glitch W/A

Disabled -> Enabled

Comment: When enabled, it forcibly adjusts signal timings between the PCIe controller and the USB controller. Slightly isolates the USB ports from EMI noise of the PCIe slot. On some powerful systems a positive effect is sometimes observed. (Where the graphics card operates in Gen4)

Gen3 Eq Phase 3 Method (Including DMI and PCIe)

Auto -> Static Equalization

Comment: Pros – The mouse becomes more precise, the game physics feel slower. The system does not think about how to adapt to the environment (it selects static parameters at PC boot). Cons – if the environment changes, the equalization may work incorrectly, causing unstable PC operation over time (for example, if you play for a long time without restarting the PC). Fixed by restarting the PC; we do not rule out that the environment may change every 5 minutes.
It is noticeable that between 5 and 30 minutes the game changes, from ideal to near-swamp.

PEG0 Max Payload size

128(Auto) -> 256

Comment: The data exchange speed with the graphics card increases. FPS becomes higher, frametime becomes better (very noticeable, smoother and more stable, as if the game runs in GPU-bound-only mode). Naturally the game becomes smoother. As a downside, other data speed suffers, for example mouse processing – it makes the mouse feel slightly sluggish – but of course it all depends on the system.

Bonus. Summary.

These are not all the BIOS parameters I know, but the ones that really give a noticeable effect. All the remaining parameters I did not mention here I posted on pastebin. There are about 30 of them there. Feed the list to an AI, ask what they do, and then it’s up to you.
And yes, I know about Spread Spectrum – in my case it does nothing, whether disabled or enabled. The same can be said about RFI. But for the sake of completeness I included them in the list: pastebin_bios_list

Don’t forget to share not only your observations here under the post, but also any other parameters if you know some =)