From what I know it is a hardware fault on that batch of cards, I have sent mine in for an RMA and my retailer has said that the entire batch was recalled so I have to wait for new stock to arrive in the country to get my replacement.
GG over at VGAforums has made a post regarding issues with the Sapphire Vapor-X card. This refers to the boot issue where the card sits with fan @ 100% and displays no image.
It has been identified in cards with the following SKU/PN so far:
SKU#11150-05 // P/N:288-1E115-020SA