Corsair - VS550 and Super Flower Active PFC230V 500W - SF-500P12A (Max 89%) which is better?

mix21

Distinguished
Apr 20, 2014
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Plan to buy R9 270x, which is better psu?

my spec

Intel core I5-3470 3.2 ghz
1 HDD 500 GB
1 4GB DDR3 Ram
Motherboard ECS H61H2-MV