[CNMO Technology News] Recently, an unexpected situation encountered by a RTX 5070 user has sparked controversy over Nvidia's Blackwell architecture graphics cards. At the moment of turning on the computer, the power cable of the graphics card melted. Although such cases are rare, they expose potential design flaws that may affect the entire RTX 50 series, including models with lower power consumption.
The event involves a Zotac RTX 5070 combined with a 750W Seasonic power supply. According to user ere9w's records, after just a few seconds of turning on the computer, thick smoke emerged from the 12V dual-row six-pin power interface of the graphics card, and the power cable was burned. This is highly similar to the failure mode of the previous RTX 4090 series. Nvidia once attributed the 4090 issue to improper cable installation, but eventually admitted that the design of the power interface needed improvement.
User ere9w further discovered obvious damage to the pins of the graphics card power interface during inspection. Several players pointed out that this interface design itself has a manufacturing defect - if the pin position is slightly off, it can lead to poor contact. The user emphasized that correct cable installation is fundamental, but the design flaw is the root cause of the problem.
This incident resonates with the analysis of hardware reviewer Der8auer. Through thermal imaging technology, he detected uneven current distribution in the melted RTX 5090 graphics card. Due to the lack of monitoring mechanisms for the power consumption of each pin in the 12V dual-row six-pin design, some circuits were overloaded, leading to overheating and melting. What is more concerning is that this defect seems to have spread to RTX 5070 and 5080, not just the high-power 5090.
Currently, the price of RTX 50 series graphics cards generally exceeds $500. If users encounter failures and are denied warranty due to "human error", they will face significant economic losses. The power supply issues of the previous RTX 40 series prompted interface improvements, but the new failures of the 50 series indicate that Nvidia still has unresolved problems in the design of the Blackwell architecture.
Original article: https://www.toutiao.com/article/7493040548224287272/
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