Reports of RTX 5090 power cables overheating and melting have been confirmed, following similar issues with the RTX 4090.Third-party cables could be the cause of the problem this time, unlike with the RTX 4090.Incidents of cable overheating and melting in the RTX 5090 are less widespread compared to the RTX 4090.Two isolated confirmed cases of cable melting have been reported, with one involving a third-party cable from MODDIY.User error may be a factor in some cases, as certain cables may not handle the power delivery required by the RTX 5090.Nvidia has transitioned to the 12V-26 connection standard for more stable power delivery, but compatibility with third-party cables remains an issue.Nvidia declined to comment on the issue, directing attention to MODDIY's warning about using older 12VHPWR cables.With limited availability of the RTX 5090 at launch, the full extent of the issue may not be known yet.It is advised to use the cables supplied in the box with the RTX 5090 to avoid potential issues.Additional reports and discussions are ongoing to determine the cause of cable-melting cases and whether Nvidia or users are at fault.