The infamous 12VHPWR connector continues to plague the Nvidia RTX 4090.
Hong Kong-based tech outlet PCM raised alarms after testing Nvidia ’s RTX 5090D and RTX 5080, where it encountered two melted 16-pin power cables and a failed 1,200W power supply unit . With GPU power demands already a hot topic, fingers were quickly pointed at Nvidia ’s newest graphics cards. However, a deeper investigation revealed that an old RTX 4090 Founders Edition was actually responsible for the meltdown.
Recommended Videos During testing, both RTX 50 GPUs were pushed to full load when the reviewer noticed system instability, initially suspecting an SSD failure. However, upon closer inspection, they discovered signs of melting on the 16-pin GPU power cable, leading to early speculation that the RTX 50-series might still be vulnerable to power connector issues.
after extensively testing RTX 5090 D, 5080, 4090, the system have some unstable symptoms and discovered both end of the 12VHPWR cable melted, we check back the pins on the cards and discover a clear burn mark on 4090 FE. 5090 D and 5080… Further investigation revealed burn marks on the RTX 4090 FE, while the RTX 50 GPUs showed no damage. This strongly suggested that the RTX 4090 FE was responsible for the melted cable, not the newer RTX 50-series cards.
Nvidia’s latest RTX 50-series GPUs actually use a revised 12V-2×6 power connector, designed to prevent power delivery unless properly seated. Recently during the Nvidia RTX AI Day 2025 event in South Korea, company representatives assured that the issues with the connector have been resolved in the RTX 50-series. This upgraded design of the connector is intended to reduce the risk of overheating that plagued the RTX 4090.
12V-2X6 12VHPWR Nvidia Nvidia RTX 4090 Nvidia RTX 50 Series RTX 5090D
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