Correct power supply hookup?

[gouki1340]

Just bought this card http://www.newegg.com/Product/Product.aspx?Item=N82E16814102730
and need help hooking power up correctly.Here is the power cable it came with in the middle http://www.newegg.com/Product/ShowI...on=SAPPHIRE+Radeon+HD+3850+100228L+Video+Card
Do i need to hook both of those cables to the power source?

 

[mailpup]

Yes, or the eight pin connector won't provide the proper power to the graphics card. Some power supplies come with the eight pin connector but I suppose that yours does not.