We have had a 6205 fail in an interesting manner after about a year of flawless operation.
There are black scorch marks on the card and one of the capacitors (I think that is what is it) is blown off and was found in the bottom of the chassis! Luckily it did not damage the server which is fine again after installing another 6205 replacement card.
The server is a 1U chassis with good cooling and it in a proper air-conditioned server room. The only thing to note is the card was facing downwards in the server.
You can also see black marks by the PCI-E connector.