PSU - 4 Pin and 8 pin connections. Should I use both?

[malicht]

Hi guys.

I have this board:

http://www.gigabyte.com/products/product-page.aspx?pid=4514#ov

At the top there is an 8 pin connector, and a 4 pin connector for powering the CPU.

I currently have the 8 pin connector all hooked up and the pc is running fine. But should I also hook up the 4 pin connector too?

 

[malicht]

Yeah i get that feeling too. I'm just not sure if I should plop the second one in or not. Idon't seem to need to. I was just wondering if it's worth it for stability.