MSI RTX 5090 Fails as 12VHPWR Connector Melts: Plastic Bulges from Excessive Heat

The recurring issue of melting 12-pin power cables is raising concerns among GPU users. In a troubling instance, both ends of the power cable have experienced damage due to a fundamental design flaw.

Latest Incident: 12-Pin Connectors on Both RTX 5090 and PSU Melt

Reports of melting connectors related to the 12-pin cable are increasing, especially among users of high-performance GPUs like the RTX 5090. These graphics cards can consume nearly 600W at peak performance, making the risk of overheating more pronounced.

A recent case highlighted by Reddit user u/Roachard reveals the problem intensifying. In this situation, both the GPU and power supply unit (PSU) connectors were affected, leading to irreversible damage. While the issue typically arises at the PSU side, this incident marks a significant failure on both ends. The user shared images of the damaged connectors, providing a stark visual of the problem.

12VHPWR melted — Image Credit: reddit.com

Notably, the user did not have overclocking enabled, and the cable in use was the 12VHPWR that accompanied the Corsair SF1000L power supply, a premium SFX model powering the MSI RTX 5090 Gaming TRIO OC. Examination of the cable revealed significant melting concentrated around four specific pins, though other pins also exhibited some damage.

12VHPWR melted on RTX 5090 — Image Credit: reddit.com

One particular pin displayed a pronounced bulge, indicative of severe plastic melting, while pins on the opposite end were heavily damaged. Previous incidents have indicated that this kind of failure often occurs when only one or two wires bear the entire power load, typically due to improper connections that shift the load unfairly. Temperatures in these scenarios can exceed 150 degrees Celsius, enough to cause damaging meltdowns.

This user invested close to $2900 for the RTX 5090, a considerable expense that puts into perspective the severity of the problem. Although RMA processes can replace faulty components, the underlying issue is likely to persist.

The newer 12V-2×6 connector introduced into the market appears to offer better reliability by ensuring more consistent contact. However, it does not resolve the fundamental design issue that allows power delivery to be dependent on a select few wires.

As the situation evolves, it’s clear that the design of these power connectors is in urgent need of addressing to prevent further incidents.

For additional information, visit the original source on Reddit.

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