20:50Machine-translated from Azerbaijani by AIRead in Azerbaijani
Reddit User Builds Module to Prevent RTX 5090 Connector Overheating
“Reddit” user “u/DallasGrave” has showcased a custom module designed to prevent the 12VHPWR power connector on an “RTX 5090” graphics card from overheating. The module, which is fastened to the back of the graphics card with screws, distributes the power load across more wires. As a result, less current passes through each wire, reducing the risk of the connector overheating. This power distributor was designed specifically for this graphics card.
On the 16-pin 12VHPWR connector, 4 small pins serve as sensors. Of the remaining 12 pins, 6 carry 12 V power. The other 6 pins are used for grounding. The connector typically uses 16 AWG wires rated for up to 600 W. When the pins are not fully seated, resistance and temperature increase. Uneven distribution of current among the pins also raises the risk of melting. The modder soldered additional wires directly to the power rails on the “RTX 5090” circuit board. The wires were connected to a separate circuit board and 2 8-pin female connectors. It was not disclosed whether the module contains a fuse, capacitor, or other protective components. The enclosure appears to have been made using a resin-based 3D printer and designed to fit the dimensions of the specific graphics card.
During testing, the graphics card was operated at full load with 550 W of power for 48 hours. According to the modder, the temperature did not exceed 40°C even at the solder joint. However, this result is based solely on his own test. Although the modification looks neat, it requires soldering directly to the power rails. It is therefore unsuitable for ordinary users. “u/DallasGrave” is affiliated with “GRAVEPC.com,” which develops cooling solutions for small computers. He said they are a “PNY” partner and will sell a similarly modified custom card with a full warranty. However, such a product has not yet been listed for sale on the company’s website. Moreover, it is unclear whether “PNY” covers 12VHPWR problems caused by 3rd-party cables under its warranty. The full-warranty claim has therefore not yet been confirmed.
On the 16-pin 12VHPWR connector, 4 small pins serve as sensors. Of the remaining 12 pins, 6 carry 12 V power. The other 6 pins are used for grounding. The connector typically uses 16 AWG wires rated for up to 600 W. When the pins are not fully seated, resistance and temperature increase. Uneven distribution of current among the pins also raises the risk of melting. The modder soldered additional wires directly to the power rails on the “RTX 5090” circuit board. The wires were connected to a separate circuit board and 2 8-pin female connectors. It was not disclosed whether the module contains a fuse, capacitor, or other protective components. The enclosure appears to have been made using a resin-based 3D printer and designed to fit the dimensions of the specific graphics card. During testing, the graphics card was operated at full load with 550 W of power for 48 hours. According to the modder, the temperature did not exceed 40°C even at the solder joint. However, this result is based solely on his own test. Although the modification looks neat, it requires soldering directly to the power rails. It is therefore unsuitable for ordinary users. “u/DallasGrave” is affiliated with “GRAVEPC.com,” which develops cooling solutions for small computers. He said they are a “PNY” partner and will sell a similarly modified custom card with a full warranty. However, such a product has not yet been listed for sale on the company’s website. Moreover, it is unclear whether “PNY” covers 12VHPWR problems caused by 3rd-party cables under its warranty. The full-warranty claim has therefore not yet been confirmed.