i just received my r9 290 Battlefield 4 edition in the mail today and im so crazed to use it. but i need to upgrade my psu . i found three online and i was wondering if you could tell me which of these are the best,
CX600: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
ZU-600B: http://www.newegg.com/Product/Product.aspx?Item=9SIA4CP1GG2219&cm_re=ZU-600B-_-17-159-128-_-Product
SP:550P: http://www.newegg.com/Product/Product.aspx?Item=N82E16817153172&cm_re=SP-550P-_-17-153-172-_-Product
CX600: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
ZU-600B: http://www.newegg.com/Product/Product.aspx?Item=9SIA4CP1GG2219&cm_re=ZU-600B-_-17-159-128-_-Product
SP:550P: http://www.newegg.com/Product/Product.aspx?Item=N82E16817153172&cm_re=SP-550P-_-17-153-172-_-Product