NVIDIA Vendor Warranty Comparison Charts
 

As usual, there are some extra benefits offered by some of the vendors, for example EVGA has 90 day step-up program. Also keep in mind some of these major vendors (XFX, BFG, EVGA) recently took the novel route of protecting early adopters when Nvidia was forced to cut prices on the GTX 200 series.

http://gpucafe.com/2008/09/nvidia-ve...arison-rev-01/