long as you keep it with the card you are probably going to be ok. butttt....on the step up front...the bigger deal is all of the packaging and crap that came with the card- you must have all of it or you cant step....kind of silly really i would have stepped to a gtx but I didnt have all the bits and so I was screwed.
great card though so no real worries.
These cards are most likely all made by Foxconn, Evga has a VERY liberal heatsink policy, so if you remove the sticker an RMA goomba wouldn't know if it was an Asus card that got toasted, handed it to a pall with an Evga for a RMA by putting the Evga cooler on the Asus and the Asus cooler (with Ghost Recon 2 advert on it) on the Evga, etc. etc. So yes, it is pretty important to them.