On April 17, 2026, renowned overclocking expert and Thermal Grizzly CEO, der8auer, unveiled the true cause behind the RTX 5090 graphics card's power connector burnout issue through meticulous disassembly experiments. Contrary to popular speculation, the experiments demonstrated that the problem was not attributable to third-party cables or user misuse during insertion. Instead, it stemmed from a severe current distribution imbalance within the 12V-2x6 connector.

During rigorous FurMark stress testing, the temperatures of certain wires skyrocketed to 60°C within just 45 seconds. By the 4-minute mark, the hotspot temperatures at the connector surged past a scorching 150°C. Alarmingly, one wire was found to be carrying a current as high as 22A, more than double the standard limit, while the remaining wires were only bearing a mere 2-3A.

der8auer elucidated that when the GPU's power consumption nears the 600W threshold, the narrow pins of the 12V-2x6 connector exhibit extremely low tolerance for current distribution discrepancies. This results in power concentrating on the path with the lowest resistance, ultimately leading to an instantaneous overload of that particular wire.