High contact resistance across unseated or misaligned 12VHPWR/12V-2x6 power connector terminals caused localized Joule heating exceeding 105°C, resulting in terminal liquefaction, open-circuit voltage drop, and GPU VRM over-current/under-voltage protection black screen trips.

⏱ 45-90 Mins Troubleshoot →

CODE 12V-2x6-DROOP-SENSE GeForce RTX 4090 SUPRIM X Critical

RTX 4090 Black Screen Fan Ramp

The GPU power telemetry circuit tripped its failsafe state. High contact resistance or an unseated 12V-2x6 / 12VHPWR connector caused terminal voltage under load to drop below the threshold on sense lines (SNT1/SNT2/Sense0/Sense1), triggering hardware over-current/under-voltage protection which halts video output and commands the fans to 100% PWM default override.

⏱ 30-45 Mins Troubleshoot →

CODE 12V-2X6-SENSE-TRIP GeForce RTX 4080 Super Critical

RTX 4080 Super Fan Spun Black Screen

The GPU driver/microcontroller triggered failsafe protection due to an open circuit or high resistance on the 12V-2x6 / 12VHPWR sideband Sense0/Sense1 pins, cutting display output and ramping fans to 100% duty cycle to prevent thermal runaway or connector meltdown.

⏱ 20-30 Mins Troubleshoot →

CODE 12V-2X6-VDROP-BLK GeForce RTX 4080 Super Gaming X Slim Critical

12V-2x6 Rail Voltage Drop

Transient high-current draw induces high contact resistance across the 12V-2x6 (PCIe 5.1 / 12VHPWR) terminal pins, dropping the 12V rail below the PCIe undervoltage threshold (<10.8V). The GPU Power Management IC (PMIC) trips Power Good (PWRGD) protection, terminating display output while system fans ramp to 100%.

⏱ 25-40 Mins Troubleshoot →