Reddit user u/Doomslayer606 posted about frayed braided sleeving on both 12V-2x6 cables for their two RTX PRO 6000 Blackwell Workstation GPUs the other day, asking whether it’s normal cable degradation or a sign of overheating. The GPUs were running at 500W, below the maximum 600W power draw, but commenters are confident it’s overheated cables, as the poster reports stiff, cracked, and easily peeling sleeves on only some of the wires.

u/Doomslayer606 posted on r/PcBuild with the title “Did I just save my RTX PRO 6000 GPUs from melting?” with photos of the 12V-2x6 cable’s braided sleeving frayed. The poster asked in the description whether this was normal degradation, a manufacturing issue, or overheating. The poster reported that the damaged braided sleeving felt stiff and peeled off easily, which is a strong indication of heat damage, and the comments were sure that it was.

Luckily, the poster’s GPUs were safe, but the 12-2x6 connectors are notorious for melting due to high power draw. One comment asked if they kept the stock power limit, to which the poster responded that they lowered both GPUs to 500W — another user responded asking why the poster wouldn’t use 300W, but the poster said it would reduce performance by up to 50% and they need to keep up with their deadlines.

94 A, which isn’t enough current to significantly heat up 16 AWG wire, but one of the main causes of cable overheating is uneven current distribution across the pins. Since only two of the pins melted on both cables, it’s likely those received high-current spikes often, leading to heat buildup.

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