Long as you purchase from an authorized seller, you won't have any difference in the GPU warranty. If you don't buy form an authorized seller, the warranty will go by when the GPU was shipped from evga (Guest RMA).  
 
If you buy from a different shop, you can still use evga product warranty. 
 
 

In the future, if you have any specific questions regarding your current card(s), simply register it on our site using the serial number and send us an email at support@evga.com and we can look at that card directly and answer any of your warranty questions.
 
Also in case you didn't see the list, we have all of our authorized retailers here:  http://www.evga.com/Products/WhereToBuy.aspx 
 
They would carry the same warranty as if you bought it directly from us.