HD 6970 pci connection

[NAGZS]

Hello, I recently purchased a new 6970, and once I started plugging in the pci, I noticed that there was an 8-pin connector AND a 6-pin connector.

Do I plug both of them in or just one????
thanks

 

[Spikesoldier]

both

 

[NAGZS]

Thankyousomuuuuuuuuuuuuch