Aerocool 500W psu

im planning to buy a branded psu, i doubt if this is good and a better performance

Aerocool Strike-x 500W 80 plus Bronze..

is this psu good? or does this psu have the enough power to support my rig?

core i3 2100
8gb ddr3 1333mhz g.skill ripjaws.
HD 6870 ddr5 powercolor

its a bit cheap so i doubt it's performance??