8 amps??(scratching behind the heat)
It think more, but my power supply has 2 rails a 14 and 15 amps and i ran an overclocked CPU and a video card that i overclocked and ran stable.(check my member configuration) CPU and RAM still overclocked but the card is stock now because i do not need more.
You will be fine with your power supply, but anyway in the near future i recommend to buy a good brand power supply because the generic ones are not that great in terms of stability and reliability.
Also if you power supply does not have a 6 pin power connector you can just use the one that came with the card. It will run fine.