According to news on October 12, for RTX4090 users, you should check the interface more to prevent unexpected events. Recently, a user named Byogore reported on the PCMR forum that his RTX4090 was damaged due to melting of the power interface. Judging from the pictures posted, this is indeed the case.
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According to this user, the RTX4090 he uses for himself has only been used for a year, and this problem has appeared, which is really scary.
The 12VHPWR 16-pin power supply interface is really annoying (the power supply capacity is increased to 600W). The RTX4090 has also suffered a lot of damage, and frequent burnouts have also given Nvidia a headache.
However, previous reports from VideoCardz showed that the public version of the RTX4090 graphics card has adopted an improved power supply interface, and a similar situation has been seen on the new version of the RTX4070.
Specifically, the new connector shortens the sensing pins and disables high-power mode when the cable is not fully inserted. At the same time, some manufacturers have also deployed this new "12V-2x6" connector on the power supply (which remains compatible with 12VHPWR, meaning that existing power supplies and power cords do not need to be replaced).