An NVIDIA RTX PRO 6000 Blackwell workstation owner has reported significant deterioration of two 12V-2x6 power cables, despite limiting both graphics cards to 500W instead of their maximum 600W power rating.
The incident involved a workstation equipped with two RTX PRO 6000 Blackwell Workstation Edition graphics cards, each featuring 96GB of GDDR7 memory.
The owner discovered that the braided sleeving around several power wires had become brittle, cracked and easy to peel away.
Fortunately, neither graphics card suffered visible damage, and the connector housings showed no obvious signs of melting.
The discovery has renewed concerns about the reliability of 16 pin GPU power connections under sustained high power workloads.
Both RTX PRO 6000 Graphics Cards Showed Similar Cable Damage
The workstation owner, identified online as Doomslayer606, shared photographs of the damaged cables while asking whether the deterioration was normal wear or evidence of overheating.
The system uses a Seasonic PRIME TX-1600 Noctua Edition power supply with native 12V-2x6 connections.
Both graphics cards were configured to operate at 500W, which is 100W below their rated maximum.
Despite the reduced power limits, the owner noticed deterioration in the braided sleeving near the connectors.
The damage appeared at both the GPU and power supply ends, although one cable showed more extensive wear than the other.
Importantly, the underlying electrical insulation reportedly remained intact.
The owner decided to replace both power cables rather than continue operating the workstation with potentially compromised connections.
Uneven Current Distribution Could Explain the Damage
The 12V-2x6 connector is designed to deliver up to 600W to compatible graphics cards.
However, the total power draw does not always indicate how much electrical current passes through each individual contact.
If current is distributed unevenly, certain wires and connector terminals may experience greater electrical loads than others.
This can happen because of differences in contact resistance, connector seating or other electrical conditions.
At 500W, the theoretical average current across six positive 12V conductors is approximately 6.94 amperes per conductor.
That figure assumes the electrical load is distributed evenly.
A heavily loaded contact could experience additional heating, potentially contributing to damage near the connector.
However, the actual cause of this incident has not been established. The damaged outer sleeving alone does not prove that excessive current or overheating occurred.
RTX PRO 6000 Incident Raises Concerns About High Power GPU Connections
The incident is particularly notable because the affected system contains two expensive professional graphics cards.
The RTX PRO 6000 Blackwell Workstation Edition is designed for demanding professional workloads, including AI development, rendering and scientific computing.
Each card reportedly costs approximately $16,000, placing the combined graphics hardware value near $32,000.
The 12V-2x6 connection has already attracted attention following earlier reports of damaged connectors involving high power consumer GPUs.
Some hardware manufacturers offer monitoring accessories that measure connector temperatures or individual wire currents.
However, compatible replacement cables should always follow the power supply manufacturer's specifications.
For owners of similarly powerful workstations, visible cracking, discoloration or deterioration around GPU power cables warrants immediate attention.
A damaged cable should be inspected and replaced with a manufacturer approved alternative rather than reused.
Although the RTX PRO 6000 cards in this case escaped visible damage, the report highlights the importance of checking power connections on expensive systems operating under sustained workloads.
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