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Pin 1???

There are many "pin 1"'s on your motherboard. Check the manual, and also look for type printed on the motherboard. Your manual is your best friend.
 
Don't have a manual...it's an HP 8580C....support site says its a 440BX, but not having much like finding info

Trying to install intenral card reader...instructions say "Pin 1 (VCC) is marked in red on internal USB cable with triangle mark on it's head. Align cable to Pin 1 on motherboard.
 
Well, then you have to go with printing on the motherboard, if you can't make it out, you are SOL. Most IDE cables have a key that allows you to determine pin1, since it won't plug in backwards.
 
Your board may not have a spare internal USB header to plug your card reader into, for starters. If it does, you can determine the VCC pin with a voltmeter (it would be +5V). If it ends up not having one, you might consider one of these for it, which are internal/external and can use a standard USB port off the rear I/O panel. I haven't tried one myself, so I'm not saying from personal experience that it's good/bad.
 
Pin one is almost always "down" or "left" on the board, if you were holding it upright in front of you. By upright I mean the side that fits the back of the case to your left. I can't remember seeing a modern desktop board that deviated from this pattern. A USB header has two rows of pins which are the same upper and lower. Sometimes the 2nd row omits the shield ground pin, so there would be a total of 9. Pin one would be the one to the left (either one), and your colors would go red, white, green, black, (then shield if you have it, black) This would be left to right or bottom to top, depending how the connector is laid out. Both rows are the same, but don't mix the wires from two different connectors on one row.
 
pin1 on ide cable is red and pin1 is always toward the power conntor on the drive.


/edit oh well im alittle off topic!
 
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