I used this to add fans to a computer that only had a case fan connector on the motherboard and it works great! Although I have a few complaints. - The ports themselves are not labeled. If you look at the color of the wires, you can see their tension. Since 5V is red and 12V is yellow, I've determined that the white connectors are the slower 5V power option and the black connectors are the full speed 12V option. I'd rather they were all black. I know I used them to determine their wattage, but the manufacturer could have just etched labels on the fan connectors. I would suggest routing the fan cables behind the motherboard and leaving them there, behind the motherboard tray, out of sight if like me you're concerned about aesthetics. ;) I didn't connect four fans to it at the same time, but I don't think that will be a problem.
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