Quote Originally Posted by Bollwerk View Post
A few thngs worth mentioning.

Power supplies usually only have enough connectors for their rated power output. In other words, power supplies that output more power will have more connectors. In general, you want to avoid using splitters to add more devices because you can end up pushing your power supply too hard.

Also, the 2x male 4-pin to 1x 6 pin power cable that came with your card is meant to have both 4-pin ends plugged into outputs from the power supply, if you don't have an existing 6-pin connector free. Simply put, 2 4-pin connectors equals 1 6-pin connector (in power supply output terms). Likewise, 2 6-pin outputs equals one 8-pin output.

Hope that makes sense.
a little confusing but it is true. The "4 pin" molex only have 3 pins, so 2 of them plug into the 6 pin PCI power connector.
Also true to be careful using a low ratied Power Supply to power 2 PCI cards. The power supply companies will not underate their units, it can only power what they tell you, get more power then you need to be safe.