Radeon 4890 help?

Hey Guys - I finally built a new system recently and came across something new.

I ordered a Radeon 4890 and when installing it i noticed there were 2 plugs in the back of the video card. Since i havent built a system since late 90's i didnt know what they were for. So, i read the instruction and it said to plug 2 6 pins from the PSU to the video. Which i did, and started my comp up and saw alittle bit of smoke come from the back of the video. I paniced and unplugged the psu.

I am returning my video card but my question is when what do i do with the plugs in the back of the video? Was i doing this correctly but the video was defective?

I am using a Corsair 850 watt with an asus deluxe v2.
Any info would be helpful thanks.