A Reddit user reported that his NVIDIA RTX 5090's 16-pin power connector caught fire and was severely burned, raising safety concerns as such failures are rare and dangerous, despite using a certified PSU and proper cables.
Linewell, the manufacturer of power cables for brands like ASUS, conducted a test on the new 12V-2x6 GPU connector. The cable, when not fully inserted, survived a 640W power test without overheating, reaching a temperature of only 41°C. The design of the cable should prevent such situations, but the test demonstrated that the new power pins are more conductive and less prone to generating excessive heat. The updated 12V-2x6 cable has become the standard for new RTX 40 cards, with power supplies adapting to the new standard. However, it's important to remember that all power cables carry some risk of failure.