Originally Posted by iateallthepies
What i need to know is whether all of the same coloured cables are the same voltage. Common sense tells me yes, i just need someone who knows what they're talking about to say the same, so whether or not the two black wires of every molex are the same voltage. Ta.
On a 4 pin molex you will see numbers 1 to 4. The yellow wire must always go into 1. The red wire must always go into 4. Those are the hot lines or the power providers. The two black wires go into 2 and 3. It doesn't matter which one because they are both ground wires.
On the 4 pin floppy molex (smaller 4 pin plug) there are no numbers. You will need to keep track which hole the yellow and red wire needs to be by making a small mark on the plug.
On the 20 pin ATX plug (big one that plugs into the mobo), you will need to number the wires from 1 to 20 making sure that 1 and 20 are on the same end.
On the 4 pin wire which plugs into certain mobos you will need to number the wires too. Same with the Aux. wire.
You will need molex pin extractors and 20pin extractor to remove the plastic house from the wires. There are other ways, such as paperclips, you can use but you risk damaging the pins than anything.
Well I hope this helps.