In the face of growing complaints about melting 12+4-pin 12VHPWR power connectors on GeForce RTX 40-series graphics cards, bespoke power cable maker Cablemod divided with my observations on the subject on the Reddit forum.
A company representative said the company has sold “tens of thousands” of cables of the new standard since it began selling custom power cords with the new 12VHPWR power connector in March this year. However, the number of complaints about burned plugs since then has only amounted to around 20. In other words, less than 1% of all power cords sold have problems. It’s worth noting that several Cablemod power cable owners have reported melted connectors in the comment thread on this topic, but the manufacturer’s support staff are already addressing these issues.
According to Cablemod, the main cause of the 12VHPWR power cable failure, at least in the observed cases, was the improper installation of the 12VHPWR connector in the graphics card power connector. NVIDIA, which conducted its own investigation, came to the same conclusions in November 2022. As practice shows, users can have problems even with a seemingly simple installation of a power cable. In a forum thread, owners of GeForce RTX 40 graphics cards complain that the new 12VHPWR connector has a completely unfavorable design. Its small size makes it difficult to plug in, and the locking mechanism doesn’t always keep the plug securely in the socket.
A number of graphics card manufacturers have proposed their own ways of solving the problem of connecting the 12VHPWR connector. For example, MSI suggests using dual-color connectors for power cables. The idea behind this is that if the user still sees the yellow part of the connector when installing the connector in the PSU or graphics card slot, then it is not installed correctly. In this case it is necessary to insert the power plug deeper until only the black part of it is visible.
ASUS has introduced a concept graphics card that has neither a 12VHPWR power connector nor the usual 8-pin sockets. Instead, the manufacturer has equipped the graphics card with an additional razor-sharp power connector that is installed in a special slot on the motherboard. The latter, in turn, is equipped with two more eight-pin 12 V sockets on the back of this slot, through which the accelerator is supplied with power.
Inno3D and Gigabyte do not offer to do without the 12VHPWR connector, but they have released models of graphics cards in which this connector has been moved to more convenient places for connecting a cable.
In most cases, NVIDIA and its partners will detect 12VHPWR connector issues under warranty and replace damaged graphics cards. Cablemod is also committed to its customers and, in the event of damage to the graphics card, will cover the cost of shipping it to service centers for repair or replacement. If the card manufacturer determines that the case is out of warranty, Cablemod is responsible for refunding the purchaser the full price of the graphics card.