Soldering Iron vs. NVIDIA: Enthusiasts Find a Radical Fix to Save the RTX 5090 from Melting

The Brazilian team over at TecLab decided to take a radical approach to tackle the overheating and melting issues with the 16-pin power connectors on NVIDIA's flagship GPUs. Instead of using the standard connectors, they busted out the soldering iron and hooked up the power cables straight to the board.

The experiment was prompted by a slew of complaints from GeForce RTX 5090 and RTX 5090 D owners. Reports keep popping up online about 12VHPWR or 12V-2x6 connectors overheating and deforming, which ends up killing these pricey cards. The engineers at TecLab openly criticized NVIDIA's approach to power delivery and demonstrated an alternative method that cuts out the weak link—the physical plug-and-socket connection. For the test, they used a GALAX GeForce RTX 5090 D HOF OC LAB XOC, which comes with two 16-pin connectors—something that should theoretically split the load, but in the enthusiasts' view, still doesn't guarantee protection against poor contact.

The TecLab specialists completely removed the stock connectors from the board and soldered thick power leads directly onto the power circuit pads. The end result looks, to put it mildly, pretty janky. Exposed wires, blobs of solder, and a total lack of factory insulation make it far from industrial standards—but the goal wasn't aesthetics, it was to test if the concept actually works. During the experiment, they used a bundle of multiple wires grouped together to evenly distribute current across all the GPU's power phases.

The system booted up without a hitch, the PC loaded up fine, and the card passed a series of stress tests, running stable for several hours under load. To keep the GPU die and memory chips cool, they used an external extreme cooling solution (dry ice or a chiller), while the soldered area and power circuitry were blasted with two beefy fans to prevent localized overheating of the conductors. The experimenters claim this approach completely eliminates the melting problem since it removes the contact resistance that occurs at the connector interface.

However, this method comes with obvious downsides. First off, you can kiss any warranty on a several-thousand-dollar graphics card goodbye the second that soldering iron makes contact. Second, the long-term reliability of such a connection is questionable—vibration, thermal cycling, and oxidation on exposed copper areas could eventually lead to contact degradation or damage to the traces on the PCB. Also, without the factory connector, you lose the ability to quickly swap out your PSU or easily remove the card for PC maintenance.

So, would you ever risk modding a $2,000+ graphics card like this if it guaranteed protection against connector overheating?