Question for all...

I have an issue I've never had before.  I have 12 rigs running, half msi 480 x 6cards and half R9 Furys x 5cards.   Two of my Fury rigs have some type of oily liquid leaking.  It's coming from one of the cards on each rig. Ever since I switched to 11.1 and started messing with the intensity did I notice the leaking.  I pulled the cards and am going to RMA them, was just wondering if anyone else has had this happen to them.  The temps of the cards aren't even close to the max rated so I'm not sure what the cause is.  The ambient temp in the room has been the same since I started mining 2ish months ago, fans blowing on all rigs.