Hi everyone,
I'm trying to determine whether this is an issue affecting my specific unit or if other owners of the ASUS ROG Strix G18 G815LW are experiencing the same behavior.
System specifications
ASUS ROG Strix G18 G815LW-S9076W
Intel Core Ultra 9 275HX
NVIDIA RTX 5080 Laptop GPU (175 W)
32 GB DDR5 RAM
Original ASUS 380 W power adapter
Windows 11 24H2
BIOS 338
Latest Intel chipset/ME drivers
Latest NVIDIA Game Ready driver
Latest Armoury Crate and ASUS updates
Problem
The laptop performs an instant hard power-off while gaming.
There is:
no BSOD
no application crash
no NVIDIA driver reset
no WHEA errors
no thermal warning
Event Viewer only records Kernel-Power Event ID 41 after reboot.
The shutdown is identical to pulling the power plug.
Games where it happened
inZOI
Starfield
Subnautica 2 Benchmark
Space Marine 2
The crashes are completely random and not tied to a specific amount of play time.
What I've already tested
BIOS updated to 338
Latest NVIDIA driver
Latest Windows updates
Latest Intel drivers
MyASUS hardware diagnostics (no errors)
Event Viewer analysis (nothing except Kernel-Power 41)
Temperatures appear normal before shutdown.
Interesting observation
I normally use an Armoury Crate Manual profile with:
custom fan curve
GPU Core Offset: 0 MHz
GPU Memory Offset: +200 MHz
CPU PL1: 75 W
CPU PL2: 90 W
While using this Manual profile I don't remember experiencing any shutdowns.
The most recent shutdown happened after an Armoury Crate update. After reboot I noticed Armoury Crate had switched my laptop to Turbo mode, making me suspect the system may have been running Turbo when the shutdown occurred.
Another G815LW owner
I recently found another owner with the exact same model reporting almost identical symptoms:
instant hard power-off
no BSOD
only Kernel-Power 41
BIOS 338
latest NVIDIA driver
original 380 W adapter
clean Windows installation
normal temperatures, voltages and power readings
He can reliably reproduce the shutdown with Hashcat benchmark in Performance mode, while Silent mode passes. He also reports that a Manual profile with reduced GPU power limits completely solves the issue.
Interestingly, Prime95 + FurMark together run without problems on his system, suggesting this is not simply a thermal issue.
Questions
Does anyone else with a G815LW (Core Ultra 9 275HX + RTX 5080) experience similar hard shutdowns?
Have you noticed any difference between Silent, Performance, Turbo and Manual profiles?
Has anyone identified whether this is related to GPU boost clocks, Dynamic Boost, power delivery or firmware?
Has ASUS acknowledged this issue or provided any engineering feedback?
Any additional data or experiences would be greatly appreciated.
Thank you!
