While 658W sounds scary, it does not compare to what we have seen on custom GeForce RTX 5090 models. On the GeForce RTX 5090 32G Lightning Z with DLSS 5, we observed the graphics card's power consumption spike to 592W at 1080p, 695W at 1440p, and 848W at 4K.
Using the Asus ROG Astral RTX 5090 as a test subject, QuasarZone recorded the current flowing through each of the six power pins from the 16-pin power connector. Before enabling DLSS 5, the power readings ranged from 6.94A to 7.47A. When activated, the power readings spiked to between 7.83A and 8.51A. While the values remained within PCI-SIG’s requirement of 9.2A per pin, headroom is extremely thin, with just 0.69A between the highest recorded current and the official threshold.
In another simulation, the Korean media outlet explored the consequences of a loose pin or improper connection in the 16-pin power connector. This is the most common scenario that leads to 16-pin power connector meltdowns, due to unbalanced power loading across the connector. With one nonfunctional power pin, the electrical load is redistributed to the remaining pins.
With DLSS 5 off, the highest current registered on a single pin reached 8.9A. This value remains uncomfortably close to PCI-SIG's standard. However, turning on DLSS 5 pushed the power pins to 10.1A, 10% above the specification. The simple test highlights just how easily and quickly things can go wrong.
QuasarZone's alarming test results may look like fuel for fearmongering. However, the publication's tests align closely with our findings that DLSS 5 substantially increases power consumption. At least one user has allegedly reported a 16-pin power connector meltdown while experimenting with DLSS 5.
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Zhiye Liu News Editor, RAM Reviewer & SSD Technician Zhiye Liu is a news editor, memory reviewer, and SSD tester at Tom’s Hardware. Although he loves everything that’s hardware, he has a soft spot for CPUs, GPUs, and RAM.
S58_is_the_goat Jensen: please use dlss5 in a well ventilated area… Reply
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- https://www.tomshardware.com/pc-components/gpus/nvidia-dlss-5-upscales-frame-rates-and-flame-temps-on-16-pin-power-connector-ai-gaming-tech-pushes-connector-to-uncomfortable-thermal-and-power-limits#main
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