Power Conectors near PC...

[Mordorr]

The 4+4 type cable is already connected from beguining....

Well have to live with that.

Thank you all.

[BigJohnny]

This is not uncommon. Yes it will have an effect on stability if you overclock. If you run at stock shouldnt be an issue. I havent seen a day where 650 watts would be enough in a very long time.
The second 4 pin should come off an 8 Pin PSU connector and simply split in half. Only one of the halves with fit the socket.
If its a problem then call their customer support and ask for another 4+4 cable or return it and buy a PSU that comes with it or simply order the extra cable. If you had a corsair I would send you one out of the pile of 20 I have in black, red, red and black and blood red as I Have more than I can use But corsair specific connectors.

[Mordorr]

I have watercooling but not extreme OC, since its hard for me to extract more...

Anyway.

Receive email from Seasonic. They are going to send a extra cable to me, wish is very nice.
Thank you very much for you offer my friend. 650wts its totally ok for my system...its a very light PC with only a old R9 270X and 3 HD`s...

Happy OC everybody, and thanks for all support.