Enthusiast Adds Fuses to GeForce RTX 4090 Power Cable to Prevent Connector Melting

A Reddit user by the name of malcarone18 has proposed a solution to prevent overheating and melting of the contacts on the GeForce RTX 4090 graphics card by incorporating six fuses into the power cable. After experiencing a failure with his graphics card, he sought to enhance its safety with these fuses during the repair process.

For the upcoming RTX 50 series, Asus has introduced a feature called Power Detector+, which allows users to monitor power consumption. However, this feature is exclusively available on their flagship ROG Astral models.

The concept presented by malcarone18 involves equipping each of the six 12V power cables with individual fuses. If any cable draws excessive current, its corresponding fuse will blow, thereby preventing overheating that could lead to melting.

The enthusiast acknowledges that his approach is not foolproof—if one fuse fails, it could trigger the others. Some Reddit users have suggested utilizing self-resetting fuses to mitigate the likelihood of recurring issues.

Another user, jlodvo, showcased a more extreme modification by soldering power wires directly to the circuit board, bypassing the graphics card connector altogether. While this eliminates the risk of melting the connector, it does not resolve the issue of uneven power distribution.

Nvidia admitted to issues with melting connectors on both the adapter and the RTX 4090 itself back in November 2022. At that time, they advised customers to ensure the power connector is securely plugged in with an audible click before installing the graphics card into the motherboard.

A month prior, an expert noted that the power connectors for the RTX 4090 were prone to melting due to the subpar stock adapter produced by Nvidia’s partner, Astron.

Regular users are advised against attempting the modifications suggested by malcarone18 and jlodvo. Instead, they should consider safer alternatives that offer built-in monitoring of current and temperature, along with alerts. Devices like Thermal Grizzly’s WireView can serve this purpose effectively.