I have a GTX 260 that I'm trying to hook up to my Frankenstien PC I've just put together. The PSU I have has a weird cable though, one of the pins on the 6-pin connectors is square:http://imgur.com/2Aarohttp://imgur.com/ChTBn
and doesn't fit into the "D" shaped hole that it corresponds to:http://imgur.com/Anlu3
Note: this card requires 2 6-pins, and both are in the same situation.
Thanks for you time and insight.