I watched a video on youtube, somone was reviewing the card. When he was unpacking it, he showed that there were two 4pin-6pin connectors..or something like that. Then he showed the video card, it had two spots to put wires in.
Just take care of your PSU. Blow it for dust and don't keep it in full-load 24/7 and in warm air (I hope that you have a decent airflow in case). Some Enermax PSU's are prone to death in some circumstances.
As said above make sure that you have good cooling air flow (don't let it get clogged with dust etc...), and ofcourse only do 1 video card and make sure you don't have your system on full load or your video card for long extended periods of time and you should be ok. When you have some extra funds I would recommend an upgrade though to atleast a 750 watt for future upgrades.