ASUS has added an automatic shutdown safeguard to GPU Tweak III for select graphics cards equipped with Power Detector+. Version 2.1.8.0 can power off a system when it detects persistently excessive current through the GPU’s 12V-2×6 connector, adding another layer of protection against overheating and possible cable or connector damage.
Key takeaways
- GPU Tweak III version 2.1.8.0 adds optional automatic shutdown support.
- The feature monitors current across the connector’s six power-carrying pins.
- Reports indicate shutdown can be configured around a 12.5-amp threshold.
- Support is limited to select ASUS ROG Astral and Matrix graphics cards.
- Users must enable the feature manually; it is disabled by default.
The update gives compatible ASUS cards an automated response to a condition that previously relied on a warning and user intervention. For ThinkComputers readers building high-power gaming systems, the feature could provide useful protection during demanding workloads, although it does not eliminate the need to inspect the cable and connector.
How the new safeguard works
Power Detector+ measures current on individual pins in supported 12VHPWR and 12V-2×6 connections. ASUS previously used the system to display connector information and warn users when a pin reported zero amps or exceeded a specified safe limit. GPU Tweak III can now shut down Windows PCs when high current remains present for a configured period.
The reported trigger point is above 12.5 amps, with configurable countdown and delay options. ASUS has not publicly detailed every timing parameter or confirmed whether the threshold can be changed independently, so users should treat the software as an emergency safeguard rather than a performance-tuning control.
Compatible ASUS graphics cards
Power Detector+ remains restricted to a small group of premium ASUS models. Reported compatible cards include the ROG Astral GeForce RTX 5090, ROG Astral LC GeForce RTX 5090, ROG Astral GeForce RTX 5080, ROG Astral RTX 5090 BTF OC, and ROG Matrix GeForce RTX 4090 Platinum.
The feature is not available to every graphics card using a 12V-2×6 or older 12VHPWR connector. Owners of other ASUS models, as well as cards from competing manufacturers, cannot use GPU Tweak III’s automatic shutdown unless their hardware implements the required Power Detector+ monitoring circuitry.
A safeguard, not a complete fix
The 12V-2×6 connector has remained under scrutiny following reports of overheated and damaged power connections on high-end GPUs. ASUS has also promoted its ROG Equalizer cable, which is designed to balance power across the connector and monitor cable temperature. However, current monitoring and automatic shutdown address symptoms rather than replacing careful installation and robust connector design.
If GPU Tweak III initiates a shutdown, users should turn off the power supply, inspect the connector for discoloration or deformation, and ensure it is fully seated before restarting. Repeated warnings should be treated as a hardware or cabling problem—not as an invitation to increase the shutdown delay. The update is available in GPU Tweak III version 2.1.8.0, released August 17, 2026, but compatible-card owners must enable the option in the software.
Via ASUS