Cooler master Thunder 600W enough for Sapphire Dual-x R9 270x 2GB????

I bought this psu seeing that it has 2×6+2Pcie pin which is required for powering r9 270x.
My question will it be able to run this gpu effectively????
My pc is not much of power hungry and its specs are Core i5 4670,4Gb G.skills ddr3 1333mhz ram,500gb hdd.