# Nvidia RTX 50-series power connector safety measures

> Live situation record from CLSTR: https://clstr.news/situations/nvidia-rtx-50-series-power-connector-safety-measures
> Updated: 2026-08-17T18:11:53.000Z. Sources: 2. Developments: 2.

Following the release of an open-source utility called ‘12VHPWR Guard’ by a Reddit user, efforts to manage power connector safety for high-end Nvidia RTX 50-series graphics cards have expanded to official software. 

The initial open-source tool was designed specifically for selected ASUS ROG Astral models to monitor per-pin current via telemetry and trigger an automatic Windows shutdown if current exceeds 9.5 A for more than 15 seconds. 

Subsequently, ASUS released an update for its GPU Tweak III software featuring ‘Power Detector+’ technology. This official update aims to enhance safety for cards using the 12V-2x6 connector by monitoring electrical current in real-time and automatically shutting down the PC if unsafe levels are detected.

## Timeline

### 2026-08-17: ASUS and HYDRA release new GPU software updates

ASUS updates GPU Tweak III with safety shutdowns for 12V-2x6 connectors, while HYDRA 2.3 enables GDDR7 overclocking for NVIDIA RTX 50 Series GPUs.

2 sources. https://clstr.news/cluster/asus-and-hydra-release-new-gpu-software-updates

### 2026-08-07: 12VHPWR Guard Open‑Source Tool Shuts Down PCs to Prevent RTX 5090 Power‑Connector Melting

Reddit user CoolerThanNos released 12VHPWR Guard, an open‑source Windows tool that shuts down PCs if any 12VHPWR pin on ASUS ROG Astral RTX 5080/5090 cards exceeds 9.5 A for 15 seconds, aiming to stop connector

4 sources. https://clstr.news/cluster/open-source-tool-shuts-down-pc-to-protect-rtx-50905080-power-connector

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Cite as: Nvidia RTX 50-series power connector safety measures. CLSTR, https://clstr.news/situations/nvidia-rtx-50-series-power-connector-safety-measures