My EVGA 580's only came with a 3 year warranty as they were branded "KR" products and you had to pay an extra £32 per card to increase it to 10 years! I had already spent £740 on the 2 x 580's
Both my old 1.5Gb card and my newer 3Gb cards were ER products so i got the 10 year one, not sure why they make the same product with different suffix's.