Some early hardware failure of NVIDIA RTX 5090 shows that using even factory-native power cable for RTX 5090's 12V-2×6 power connector can lead to melted power connector. This is interesting as it is a challenge of common expectation for the new power connector standard to be immune to the past generations' problems with power connection. It's necessary to check out your power connector connections right now to avoid this hardware failure with high end components.
Loose plug causes connector melting on RTX 5090 with factory cable
Hardware failure happens with RTX 5090 graphics card and FSP Hydro GT Pro 1000W PSU. A user noticed specific smell of burn-like smell and then lost the functionality of RTX 5090. After opening the card, he found a seriously deformed plastic enclosure of power connector on GPU side.
A closer look at the hardware components shows that the upper contact blocks of the 12V-2×6 connector have serious issues. The main reason is due to the increased contact resistance of 12V-2×6 power connector because the plug doesn't go all the way in, or there is over mechanical stress on the power cable. 12V-2×6 standard is supposed to be less fire-prone than the legacy 12VHPWR spec. But the physical connections quality is still vital.
Make sure you fully insert the power connector and latch it. Don't have sharp bends around the power connector area so that it won't cause mechanical stress on the power connector pins. We have been monitoring related RTX 5090 stability issues including this article for ASRock TempGuard Fails to Shut Down to underline the importance of correct installation for this new generation of hardware.
This report tells us that it is critical to make sure the power connector is correctly installed for safe operation of RTX 5090. This serves as a real-life reminder of the importance of carefully physical handling of the hardware standard to make it work properly.



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