Yes, it's just a hybrid pin just in case you only need 6. Are you sure you don't have an 8 pin connector, because I checked your model psu and it states that it comes with an 8 pin connector as it should.
I think I'll get http://www.newegg.com/Product/Produc...-668-_-Product
instead of the one posted above because the one above has bad transisters and this one doesn't. Does this one have good VPMs for overclocking with increased voltage?