The worry around melting power connectors on high-end graphics cards like the GeForce RTX 4090 isn’t entirely gone, and recent news brings the issue back into focus with the newer RTX 5090. What’s particularly surprising this time is that the melted cable was one of MSI’s special designs specifically intended to prevent this problem.
A user on Reddit shared their experience: their monitor suddenly went black, displaying a “DisplayPort not connected” error. After troubleshooting, they found the real issue: the power cable connector plugged into their powerful RTX 5090 had partly melted. The graphics card itself, thankfully, seemed okay.
This incident is noteworthy because the cable involved was one of MSI’s ‘yellow-tipped’ versions. MSI introduced these cables where a portion of the connector housing is colored bright yellow. The idea is simple and clever: if you can still see any yellow when the cable is plugged into the GPU, it’s not fully seated. If no yellow is visible, the connection should be secure, reducing the risk of overheating that causes melting.
Melted 12V-2×6 power connector on an RTX 5090 using an MSI yellow-tipped cable
The power supply used in this case was a robust Corsair HX1500i 1500W unit. This suggests the problem wasn’t due to insufficient power delivery from the PSU itself, but rather something related to the cable connection or the cable/port design under load.
This isn’t the first time an MSI yellow-tipped cable has been reported to melt with an RTX 5090. A similar incident occurred in April, also involving a high-wattage, ATX 3.1-compliant power supply. In that previous case, the user experienced system instability before discovering the melted connector.
MSI promoted their dual-color cables as a user-friendly solution to ensure proper connection, highlighting that seeing yellow meant the connection wasn’t secure.
Why Does This Keep Happening?
Despite efforts by manufacturers like MSI to improve cable design and user guidance, these melting issues persist. A big part of the discussion often revolves around user installation and cable bending.
Many commenters on the Reddit thread where this latest incident was reported pointed out that the cable in the photo appears to be bent quite close to the connector plugged into the GPU. Cable manufacturers and Nvidia have generally advised against bending these high-power cables within a few centimeters of the connector.
Close-up view showing the bend in the melted MSI 12V-2×6 power cable near the connector plugged into the GPU
This bending can put stress on the pins inside the connector, potentially causing poor contact on one or more pins. A poor connection means higher electrical resistance, and higher resistance generates heat, especially under the heavy load of a powerful GPU like the RTX 5090. In tightly packed PC cases, avoiding sharp bends can be difficult, creating a practical challenge for builders.
While concerning, the number of reported melting incidents on the RTX 50 series appears lower than what was seen with the initial launch of the RTX 4090. One repair shop famously reported seeing hundreds of melted RTX 4090s a month at one point. A dedicated Reddit thread tracking RTX 5000 12VHPWR issues lists a handful of confirmed cases so far.
What This Means for PC Builders
This latest incident serves as a reminder that while cable and connector designs are evolving (like the transition from 12VHPWR to 12V-2×6, which features slightly shorter sense pins for better compatibility checking), careful installation remains crucial.
Even with features like MSI’s yellow tip, ensuring the connector is fully seated AND minimizing bending near the connector is essential. If you’re building a PC with a high-end GPU using this type of connector, pay extra attention during installation and consider case size to allow for adequate cable routing without excessive bending.
Staying informed about these issues is important for protecting your expensive hardware.
