And to clarify for those who came straight to the comments - this wasn't a case of the customer buying a new PSU and just assuming the cables matched. This was an RMA unit, and was sent to him without cables. I don't see how this can be interpreted in any other way than him being intended to use existing cables (and even if that was an oversight, it's still theirs to bear the consequences)

EVGA are quoting warranty conditions, but surely this just comes under common tort liability, at least for the material cost of the damaged drives?