That, my friend, looks like one *beautiful* power supply unit. In which case, it is also quite likely that the manufacturers have actually been conservative with the wattage rating. You should be fine.
And congratulations on your new card. IMHO, it is the best you can buy today at that price range.
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Thanks. And thanks for the help. Glad you mentioned the possibility of dual rails, too, because the little sticker with the table on it is rather awkwardly placed, and it took me several looks to see the +12V-B listing, which I started praying for as soon as I only saw 18A for 12V-A. If I hadn't known about that, I would've given up in despair.