Shortly before the NVIDIA GeForce RTX 4090 graphics card was launched, there were some unpleasant reports out about the very high power consumption of the graphics card, and whether the newly introduced cable, namely 12VHPWR, was sufficient to accommodate this power consumption.
A few weeks after the graphics card was launched, there were several cases where the cable melted due to power flow issues and high temperature at the cable head.
These 12VHPWR cables are reported to come with the ability to accommodate power supplies as high as 450 to 650W, but have their own problems such as low plug and unplug limits and so on.
It was also reported that this issue of melted cable heads is most likely also caused by these power cables being bent too close to the cable heads.
This causes the contact sites between the cables and pins to be uneven, which results in uneven power flow to the graphics card. This causes heat to build up around the cable head and cause it to melt.
Companies like CableMod have warned that for this 12VHPWR cable, the 3.5cm spiral before the cable head must not be bent to ensure that the power supply can be delivered to the graphics card without any problems.