Interesting that it lasted two years with their 4090 with no ill effects. Even though the 5090 is higher power draw, I would suspect the contact resistance of the cable was causing heating even before, just not enough to smell or deform the connectors.
Copying over my comment from elsewhere:
Interesting that it lasted two years with their 4090 with no ill effects. Even though the 5090 is higher power draw, I would suspect the contact resistance of the cable was causing heating even before, just not enough to smell or deform the connectors.