I never said anything about upgrading to a new card
I said when one of your cards dies later on your knackered, as chances are by that time those cards wouldn't be made anymore as the new ones are now out, so an RMA wont get you another one of those cards for your SLi if theres none left, so its bye, bye to your SLi, its happened to loads of ppl, thats what happens when the new cards comes out, they stop making the ones before, like when then 8800's came out, the 7900's were stopped, so if your card dies a good while after the new ones are out, then chances are you won't get another one from an RMA due to there being none of those cards left, its one of the pitfalls of SLi, so you have to sell the other one as you cant do SLi anymore as they will have sent you a different card, they only have to give you equal or better performing.