I just ordered a Sapphire R9 270X 4gb graphics card but thought that there is a slot on the power supply for the connectors that come with it and ive just checked it and i only have one 4 pin connector coming out of the power supply, am i supposed to have another one or does one 6pin go to the motherboard and one go to the power or what im confused, i have a 500W power supply which is enough to run the card and at the moment i have a radeon hd 6670 which has no wires coming off it or going to it so what should i do?