NVM: I think I know your story: Vega 64 overclocking can't get power play to work - #5 by GoldenAngel1997
Are you overwriting the firmware on it?
Ok, slow down, first what do mean by “interposter”, “bga” and “reflowing”?
Can you post the artifacting problem as images?
Or a video?
What’s the vendor, brand and model of the card?
How long have you used it for, what was it’s use case?
Is in a well circulated case for it to breath?
What’s the power supply?
What operating system are you using and version?
How have you come across this artifacting? When did it begin, what has changed before then?