Persistent DPC/ISR Latency on 2025 Zephyrus G16 (GU605CR) — Micro-stutters and Audio Clicks

[asus_broken_zep]

I've been dealing with this issue for months now, across multiple BIOS and firmware updates, and it's getting frustrating.

On my brand-new 2025 ROG Zephyrus G16 (GU605CR) — Intel Core Ultra 9, RTX 5070 Ti, 32GB RAM, 240Hz OLED display — with BIOS fully up to date, I’m still getting random micro-stutters both in games and even while just browsing or moving the mouse on the desktop.

It’s subtle but very noticeable once you spot it — the mouse cursor hangs for a split second, audio crackles, and games hitch for a frame or two.

LatencyMon confirms the issue within minutes:

 

Highest interrupt to process latency: 29194 µs
Highest DPC routine execution: 1681 µs (nvlddmkm.sys – NVIDIA Kernel Mode Driver)
Highest ISR routine execution: 424 µs (wdf01000.sys – Kernel Mode Driver Framework Runtime)

 This is not normal behavior for a high-end gaming laptop. I’ve tested multiple BIOS versions and firmware updates released by ASUS — none of them have made any difference. The issue persists exactly the same across all versions.

Please stop dismissing this as a Windows or driver quirk — this is clearly a firmware or ACPI-level latency problem that’s been reported repeatedly since at least 2021. The fact that it still affects brand-new 2025 Zephyrus models is unacceptable.

A laptop at this level should not have such inconsistent real-time performance baked into the system.

Also thanks to https://github.com/Zephkek/Asus-ROG-Aml-Deep-Dive

thanks to this also guy.

[Falcon2_ROG]

@asus_broken_zep 
I sent you a message, please check it.

Thank you.

[asus_broken_zep]

@Falcon2_ROG 

I have send you a message.