Original message 12/24/2023, 9:17 AM –
Seasonic recommends that you preheat 12VHPWR cables before bending. At least the part of the cable that you want to bend, for example with a hair dryer.
It is one of the recommendations that the power supply manufacturer makes on its information page about the 12VHPWR and newer 12V-6×2 cables. You are also requested to press the plug firmly, not to bend the cable after connecting the plug and preferably to watch a half-hour YouTube video about possible dangers of the 16 pin cable.
Not bending too close to the plug is also advised.
This concerns the infamous melting of 12VHPWR connectors on Nvidia’s RTX 4090 video cards, of course; something that still seems to happen regularly. Coincidentally, CableMod issued a recall the day before yesterday for its angled 12VHPWR adapters, which can loosen and melt despite being upgraded with 12V 6×2 plugs.
Update 28-12-2023, 10:31 –
A few days after the first messages about this advice, Seasonic seems to have quietly removed it from its manual for the 12VHPWR cables. Although the page still indicates that it is wise to bend the cables before plugging them in, this is no longer mentioned in the step-by-step plan at the bottom of the page.
It is likely that Seasonic has updated the page after last week’s sudden media attention. It may be that the information was mainly intended for experienced computer builders and that it now reached too broad an audience. Less experienced users could damage their cables, or worse, following these instructions. There are also several solutions that generally make the tight bending of these cables unnecessary. Although these products also have their share of problems.
Sources: Seasonic, Reddit (photo), Tom’s Hardware