An experimental utility has pushed the ASUS ROG Zephyrus G16 beyond its normal combined power limit, allowing the thin gaming laptop to reach roughly 215W across its CPU and GPU.
The modification shows that the hardware can operate above its factory settings, but it also exposes why ASUS limits the system to a lower power target. Under heavy gaming loads, temperatures climb close to thermal throttling and the cooling fans run at extremely high speeds.
The test used NvpwrControl, an experimental utility designed to unlock higher power limits on selected NVIDIA laptop GPUs.
RTX 5090 reaches 185W in Cyberpunk 2077
The modified Zephyrus G16 was tested in Cyberpunk 2077, a demanding game capable of placing a heavy load on both the processor and graphics chip.
With the higher power limit enabled, the laptop's RTX 5090 reached around 185W while the Intel Core Ultra 386H consumed about 31W.
That puts the combined CPU and GPU load at roughly 215W.
| Component or setting | Reported result |
|---|---|
| Normal combined limit | Around 175W |
| Modified combined load | Around 215W |
| RTX 5090 power | About 185W |
| Core Ultra 386H power | About 31W |
| GPU temperature | 84°C |
| CPU temperature | 95°C |
| CPU fan speed | Around 6,700 RPM |
| GPU fan speed | Around 6,800 RPM |
Before the modification, demanding workloads could push the GPU toward roughly 160W while leaving the CPU with only about 13W.
That power distribution could restrict processor performance in situations where both components need significant power at the same time.
Unlocking the limit gives both chips more room, but the cooling system becomes the next major constraint.
Temperatures quickly approach throttling limits
During testing, the RTX 5090 reached 84°C.
That placed the GPU only a few degrees below its reported thermal throttling point.
The CPU reached 95°C, leaving similarly little temperature headroom before reaching its maximum operating range.
These figures show that the Zephyrus G16 cooling system is already working near its practical limit when the combined power target is raised to 215W.
Ambient temperature would also matter. A cool room could help the laptop sustain higher power for longer, while warmer conditions would likely cause thermal throttling sooner.
Thin gaming laptops have limited internal space for heatsinks, fans and heat pipes, which makes sustained power increases more difficult than on thicker systems.
Fan noise becomes another major problem
The higher power limit also forces the cooling system to run almost at maximum speed.
During the Cyberpunk 2077 test, the CPU fan reached approximately 6,700 RPM while the GPU fan climbed to about 6,800 RPM.
At those speeds, noise becomes a significant practical drawback.
The laptop may technically deliver higher performance, but the combination of high temperatures and constant fan noise could make extended gaming sessions uncomfortable without headphones.
The extra thermal load could also place additional stress on voltage regulation components and other motherboard parts over time.
The 175W factory limit has a practical purpose
The experiment helps explain why a premium thin laptop such as the Zephyrus G16 ships with a lower combined power limit.
Its slimmer chassis prioritizes portability, weight and design alongside gaming performance.
Increasing the power ceiling can improve CPU and GPU performance in certain workloads, but the cooling hardware does not gain additional capacity when software limits are removed.
That means extra wattage quickly turns into more heat and noise.
NvpwrControl remains an experimental tool, and changing laptop power limits carries risks including instability, overheating and possible hardware damage.
The 215W result is therefore more useful as a demonstration of the Zephyrus G16's limits than as a practical everyday configuration. The test shows that the laptop can reach higher power levels, but it also confirms that cooling and acoustics become serious constraints once the system moves far beyond its factory settings.
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