geforce 660 ti 2gb jetstream

Hi, have got an intel i5-6500 and 550w psu, 1 ssd 1 hdd, 8gb ram, will install a used Palit GEFORCE GTX 660TI 2GB JETSTREAM, which has 2 x 6 pin connectors for power,,,,will my system handle it??? im not good with these things,,,,, hehehe, please , any help advise is appreciated.....its not...