return it all. then go to this guy
https://bitcointalk.org/index.php?topic=74397.msg6783806#msg6783806buy from him cost about 35 bucks his are highest quality. then let me know you ordered them.
I will sell you this for 35 shipped.
http://www.evga.com/Products/Product.aspx?pn=120-PB-0750-KRyou will be far better off and you will spend 70 bucks. you will be able to power 3 blades.
as cablez has 3 plugs 2 sets have 6 plugs.
I have all the gear you have and I have the better gear. night and day difference.
by the way your gear will pull 10 to 20 watts more as the psu you picked is under 80% more like 70%
you should reall get the cables by cablez
let me see if I can find a good psu for you. as you may not want to get my used one.
here is a good choice of 2 psu's
http://www.amazon.com/Corsair-Builder-Watt-EPS%C2%A0-CX600/dp/B0092ML0OC/ref=sr_1_1_m?m=ATVPDKIKX0DER&s=pc&ie=UTF8&qid=1400938725&sr=1-1http://www.amazon.com/Corsair-Builder-Watt-EPS%C2%A0-CX600/dp/B0092ML0OC/ref=sr_1_1_m?m=ATVPDKIKX0DER&s=pc&ie=UTF8&qid=1400938725&sr=1-1almost forgot this tricks the psu
http://www.ebay.com/itm/261302980079?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649your gear purchased is a little less, but it is not good as compared to above.