NVIDIA RTX 3080 vapor chamber with a hole develops blue substance inside
As per the QuasarZone report, certain RTX 3080 Founders Edition and RTX A6000 graphics cards may be susceptible to problems related to vapor chamber cracking. The initial thread on this issue was initiated by a member, likely a technician, who was assigned the task of investigating the root cause behind the excessively high hot spot temperatures exhibited by these cards.

Importantly, these graphics cards had not been previously opened or subjected to repasting, as confirmed by the original author of the thread. However, it was swiftly determined that there was a breach in the vapor chamber. This breach resulted from a chemical reaction that gradually created a hole within the vapor chamber. Because of this, fluid leaked out of the chamber and oxygen got into the void.
https://videocardz.com/newz/breaking-badly-when-blue-substance-is-found-in-cracked-geforce-rtx-3080-vapor-chamber