Was running a really good vantage and heard 2 POPS and smell that dreaded electrical burn smell. Quickly power off. inspect every thing.
couldn't isolate. Smell is in room but no components looked bad or smelled.
Pulled video cards they looked fine. put the good over clocker back in works great. Put the other one in. all jittery and weird.
Conclusion one of my 480's POPPED.
What a bummer.