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Does not matter if it was registered or not, the warranty goes by the cards serial number.
EVGA warranty begins from the date the product is shipped from the EVGA warehouse.
I expect they're refurbs sent to OcuK from Gigabyte. I expect OcuK sent back 10 faulty cards to Gigabyte and received these in return...or something to that effect.
I'd be tempted by the Gigabyte 780 GHz if we could get some clarification.
See my post above