SO ive got my 8800gt xfx...im a litle confused because basically i have 2 differnt leads, one is a 6 pin > 3 pin molex....the other is a 6 pin > to two 3 pin molexs...which one should i use????? sorry just dont want to over power. underpower the card!
You should not use the supplied power connection. Most card manufacturers will not recommend using it at all. You need to check you power supply for the proper connection and then also check you PSU for proper voltage.
All the pictures I can find show 1 6pin power connection on the end of the card. Try to find that on your PSU and us it if not as a last resort use one of the molex connectors. And use the 2 -3 pin to 6 pin connections.