A few days ago, JonnyGuru reported that most of the melting issues that occur with 16-Pin ’12VHPWR’ connectors on NVIDIA GeForce RTX 4090 graphics cards were due to a bad or incorrect connection. Now, a new case has emerged showing that the 16-pin ’12VHPWR’ cable is melting tooth even though it is connected correctly.
NVIDIA GeForce RTX 4090 16-Pin ’12VHPWR’ Connector Melts Despite Correct Connection, First Case of the 4090 Founders Edition Also Reported
Redditor, u/m_hijazl, posted in the NVIDIA subreddit how his custom ZOTAC GeForce RTX 4090 AMP Extreme AIRO phone ended up melting the 16-pin connector. The user reported that his card was running smoothly and was a huge jump in performance over his previous card, the RTX 3080 but while playing Cyberpunk 2077, his computer started flickering and reportedly noticed a burning smell that cut off the power immediately. PSU. When inspecting the cables, it was confirmed that the 16-pin connector on the card had melted.
The user states that there are no severe bends and the cable is connected correctly. He even heard a click confirming that the connector was firmly attached. His GeForce RTX 4090 graphics card and adapter have also been damaged, so the user is left with no choice but to switch back to the RTX 3080 for now until a proper solution is found.
but that is not all. So far, we’ve only seen custom NVIDIA GeForce RTX 4090 connectors melt but the first case of the Founders Edition variant and a 16-pin ’12VHPWR’ connector has been reported in Taiwan. TechTuber, 阿 【】, reported that the user reporting the problem was running the card on an EVGA 1000W G5 Modular PSU inside a Corsair 7000X RGB housing that has plenty of room to support the massive graphics card. The computer owner also noticed a burning smell while playing League of Legends which shut down the system and checked the cables that had already melted. Again, both the connector and the transformer were affected.
So far we can see that the problem is not related to the type of switch used (150V or 300V), it is not related to the connection (fully plugged in or partly plugged in) and it is also not related to using older ATX 2.0 PSUs like ATX 3.0 PSUs also experienced the same issues . So if it’s not any of those three, it could be something much worse, like a design flaw. While the cases are still much smaller than the total number of NVIDIA GeForce RTX 4090 graphics cards shipped (100,000 shipped vs <100 cases = 0.1%), they are still serious and many people may not have reported their issues yet. Based on our findings:
- 1 – The fully conductive conductor can be melted
- 2 – The partially conductive conductor can melt
- 2 – ATX 3.0 PSU can also make the connector melt
- 3 – Not an issue only with the 12VHPWR Adapter (16-pin to 4×8-pin)
- 4 – The cable can break after some time on its own (due to bends and resistance)
- 5 – PCI-SIG planned revision on 6 December
- 6 – NVIDIA is working on a component review (popular at the moment)
NVIDIA hasn’t responded or shared its findings, but we know the company is working with PCI-SIG to release a new review of the switch, and from what we’ve heard, even a new revision of the 12VHPWR socket is on the way. We will provide another update in this next week.
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