I have just replaced the power cord on my mining system. It has 2 5770's, a 5850, and a 5670. I am using a 760 watt psu. This is the old power cord.
http://img407.imageshack.us/img407/3184/img0103hm.th.jpg


http://img843.imageshack.us/img843/4179/img0105py.th.jpg

It was brittle.
What did i do wrong?