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In a nutshell: The RTX 5090 and its predecessor, the RTX 4090, have been plagued by reports of catastrophic thermal failures that can cause the 16-pin power connector to melt, often destroying the card in the process. A team of Brazilian YouTubers has now seemingly found a "solution" to the problem by soldering the power cables directly to the GPU PCB.
TecLab recently demonstrated a workaround for the RTX 5090 thermal failures by modifying a 5090 to bypass the problematic 16-pin power connectors and route the power wiring directly to the GPU's PCB instead. For the experiment, they used a Galax GeForce RTX 5090 D HOF OC LAB XOC, which comes with two 16-pin power connectors designed for extreme overclocking.
The modification was carried out in two steps. First, the team used two adapters to accommodate two sets of wires from each 16-pin connector before soldering them to the connector traces on the PCB. Next, they removed the heatsink and the two 120mm fans cooling the GPU and added an industrial-strength water cooler to reduce the GPU's core temperature.
