RTX 5090 12VHPWR Connector Potentially Molten: 150°C Temperatures Reported
PC enthusiasts and players should be aware of a potential issue. Brand new, power-hungry GeForce RTX 5090s are showing signs of 12VHPWR connector overheating. Reports are emerging that the connector feeding these cards is getting excessively hot. Temperatures of 150°C have been recorded on the PSU side.
Der8auer Investigates RTX 5090 Connector Temperature
Initial reactions to a user reporting a molten RTX 5090 connector suggested user error or third-party cables as the cause. However, overclocker and hardware expert Der8auer investigated the situation.
Der8auer replicated a setup using a liquid-cooled RTX 5090 FE and a high-quality Corsair cable under FurMark load. Thermal imaging revealed connector temperatures rising rapidly. The 12VHPWR connector reached 150°C on the PSU side and approximately 90°C on the GPU side within minutes.
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Uneven Current Distribution Suspected
Der8auer's investigation points to uneven current distribution as the likely cause. In the 12-pin connector cable, some wires are handling a disproportionate share of the RTX 5090's power demand. Wires designed for 8 Amps were found carrying over 20 Amps. This overloading generates excessive heat, leading to high temperatures and potential melting.
This issue is not necessarily due to bad cables or user installation. The problem appeared even with a reputable Corsair cable and a secure connection. The 12VHPWR design, intended for simplified high-power delivery, may be struggling with the RTX 5090's high power load via a single connector.
RTX 4090 Parallels
This situation is reminiscent of the RTX 4090 melt issues, as noted by Der8auer. The RTX 4080, with lower wattage, did not experience widespread connector problems. This further suggests that the high power demands of top-tier cards through the current 12VHPWR specification could be a factor.
Recommendations for RTX 5090 Owners
This is an ongoing situation, and these are initial findings. If you own or plan to own an RTX 5090, consider these points:
- Monitor Connectors: Regularly check your 12VHPWR connectors on both the GPU and PSU sides for discoloration, melting, or excessive heat.
- Solid Connection: Ensure the 12VHPWR connection is firmly and securely plugged in. Double-check it.
- Airflow: Maintain good airflow around the connector area within your PC case.
- Stay Informed: Follow developments on this issue. Expect further investigations and responses from NVIDIA and PSU manufacturers.
The RTX 5090 may be pushing the 12VHPWR connector to its limits. Whether a redesign, potentially with dual connectors for high-power cards, is needed remains to be seen. This situation warrants close attention. Stay tuned for updates.