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Modder 'fixes' melting RTX 5090 power connectors with custom distributor

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Modder 'fixes' melting RTX 5090 power connectors with custom distributor

Reddit user u/DallasGrave shared a fix for his RTX 5090, one of the best graphics cards, whose 12VHPWR connector was overheating, along with an image of a module screwed onto the back of his GPU. This module is apparently a custom-made power distributor that splits the current load across more wires to lower connector temperatures. Apparently, u/DallasGrave is connected to GRAVEPC.com, which offers mainly custom cooling solutions for small form-factor PCs.

In response to a commenter asking whether this mod will be covered under PNY’s warranty, he said, “We're a PNY partner. You'll be able to buy a PNY-specific card with a similar modification directly from us with a full warranty.” This mod isn't currently on his website, however. PNY hasn't been great at honoring warranties for the 12VHPWR issue with third-party cables, as covered in this recent story about a third-party cable melting in use, so take the claim of full warranty coverage with a grain of salt.

The 16-pin connector issue plagues many Nvidia graphics cards because they draw high current through what is essentially a 12-pin connector. The four smaller pins are sensors, and the remaining 12 are split between six +12V and ground connections. The connector typically uses high-current-rated 16AWG cables, and in theory, they should handle up to 600W.

Apparently, some cases of these melting connectors are due to poor connections where the pins don't make enough contact, causing high resistance and heat buildup, and uneven current distribution is often a source of issues.


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