ahhh, ok, so... you can use a 6 pin... hmmm, i didnt know that for sure...
haha, if you google it, there are actually a lot of people asking that same question..
does your card only have the one 8 pin or an 8 pin and a 6 pin? if it has both, just connect the 6 pin and it should work fine. it just wont overclock very well.
EDIT---- beat me posting a response... if you found the way to SAFELY connect it (by that i mean not frying you or your card) then you are good to go..