Hello, i have problem, my brother was messing with my GPU sapphire 5670, he wanted to clean it and insted of blowing dust off, he touched all chips with fingers while pc was off (the PSU was also switched off) he is not sure if he was properly grounded ( he only held the painted part of the pc case) now i`m scared because i`m aware of ESD, so could he caused some sort of damage i tried testing card with 3D Mark Vantage and it is all normal... please help