I will hopefully never have to RMA with Asus, but I RMA'd my galaxy 780 and it has been pretty bad, five weeks since they received it after i paid $30 for shipping, no updates other than "we have no 780s in stock" without an explanation.
I dont know if this helps, but if you get a crimper for $20 you can make custom extensions, which dont have double wires and do not void the PSU warranty. They still look good and use much less sleeving
Somebody on another forum sent the website that sells this an email about a "GTX 680" and their response was something like this:
"Silly customer, why would we sell big brand card for little money? This card do very good for you very good gaming" (actually their response)