User reports have surfaced documenting instances of power connector melting on NVIDIA’s high-end RTX 5090D graphics cards, specifically on models manufactured by Gigabyte and Gainward. This development raises concerns similar to earlier RTX 4090 incidents which also involved thermal failures at the 16-pin power interface.
Photos shared on Chinese tech forums and social media platforms show scorched 12V-2×6 connectors. This is the revised connector standard intended to prevent the problems associated with the original 12VHPWR design. Affected users experienced system shutdowns and power instability along with visible melting at the PSU-to-GPU junction.
Both Gigabyte and Gainward cards were using NVIDIA’s updated 12V-2×6 interface, rated for 600 watts of power. The connector includes safeguards such as an improved contact area and shorter pin length to prevent arcing or misalignment. However, current evidence indicates implementation issues are still present.
The affected models include:
- Gigabyte RTX 5090D WindForce OC
- Gainward RTX 5090D Phantom GS
User-posted images suggest excessive heat buildup at the cable-to-GPU interface. Likely contributing factors include:
- Improper seating of the connector due to either user handling or flawed PCB tolerances
- Poor airflow or thermal regulation inside the case
- Overclocking or sustained high power draw under load
- Manufacturing inconsistency in power delivery hardware or cable construction
At this time NVIDIA has not released an official statement. It remains to be seen whether board partners or retailers will address failures under existing RMA frameworks.
Public response reflects broad dissatisfaction with recurring design flaws:
“I thought this was supposed to be fixed with the 12V-2×6. Now it’s worse. And I paid a premium for this card.”
— Forum user on Bilibili
“Same issue as the 4090. Same connector. Same result. No lessons learned.”
— Commenter on Weibo
Technical Context for the 12V-2×6 Connector
The 12V-2×6 power connector was designed as a direct response to 12VHPWR melting problems observed during the early release of RTX 4090 cards. Rated for up to 600 watts, the connector relies on precision engagement between cable and socket. Even minor gaps or looseness increase resistance, generating heat that can cause plastic deformation or failure.
Key precautions emphasized by NVIDIA and third-party PSU manufacturers include:
- Avoid bending the cable within 35mm of the connector
- Limit repeated insertions to reduce wear on contact points
- Use only certified adapters or native 12V-2×6 cables
These guidelines have not always been followed in consumer PC builds, especially in space-constrained cases or with aggressive GPU mounting angles.
Industry Implications
If confirmed on a broader scale, these incidents could damage consumer confidence in the RTX 50 series. Hardware reliability is a key factor for enthusiasts and professionals. Potential consequences for NVIDIA and partners include:
- Reevaluation of the 12V-2×6 connector’s long-term viability
- Increased warranty claims and component returns
- Pressure to revise board layouts or adopt alternative power standards in future GPU releases
Consumers should inspect GPU connectors for proper fitment, ensure cable slack does not cause strain, and monitor GPU temperature behavior under load. Avoiding unnecessary overclocking during initial installation is also advised.
Conclusion
The RTX 5090D offers top-tier performance but early reports of melted power connectors introduce significant risk. With both Gigabyte and Gainward units affected and images confirming physical damage, NVIDIA and its partners must address this issue before confidence deteriorates further.
Users planning to purchase or install RTX 5090D cards should proceed cautiously, verify all power connections, and monitor hardware closely for signs of instability.
Works Cited
“Reports of Melted Power Connectors on Gigabyte and Gainward RTX 5090D Cards Emerge.” VideoCardz, 20 June 2025, https://videocardz.com/newz/reports-of-melted-power-connectors-on-gigabyte-and-gainward-rtx-5090d-cards-emerge.
Smith, Mark Tyson. “RTX 5090D Melting Issues Reported on Baidu.” Tom’s Hardware, 20 June 2025, https://www.tomshardware.com/graphic-cards/nvidia-rtx-5090d-connector-melt.
Warren, Tom. “Nvidia’s New GPU Power Connector Standard Arrives After RTX 4090 Meltdown Fiasco.” The Verge, 13 Dec. 2023, https://www.theverge.com/2023/12/13/23997436/nvidia-12v-2×6-power-connector-gpu-standard.
“12VHPWR.” Wikipedia, Wikimedia Foundation, https://en.wikipedia.org/wiki/12VHPWR. Accessed 21 June 2025.