All cards are sold without a warranty.
See this line in the first post:
All products unless otherwise specified DO NOT have warranties associated with them. HOWEVER, I will be giving you a 15 day guarantee covering any manufacturing-caused malfunction which may happen. If something does happen, you pay shipping back to me. If the product is found to be without defects and in working order, it will be returned to you and no money will be refunded.
The only real difference between this card and a retail card is the SKU which is associated with a first-run product and a lack of a dual Molex to PCI-E power adapter in its accessory package.
Just for future reference I checked with ZOTAC about them providing warranty for the card. Provided the SKU, SN. They said no, that the card was identified as Not for Resale and therefore they would not warranty.Didn't some manufacturers say they would honor the warranty?