is this PSU good enoguh?

i want to get this psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817371055 is it enough for a sapphire radeon 7870 xt?thanks in advance
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its ok i found the psu i needed the one above is multi railed realized i only needed single railed psu

Replying to #1

number of rails is completely irrelevant, it's the number of amps that rails supply that matter.

yes becuase it had 4 rails each rail only supplied 30 amps the card requires 34