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Old 12-17-2018, 11:28 AM
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Join Date: Feb 2017
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Good eyes!

So ... here's how it works. Each internal USB header has 2 USB ports. Each USB port uses 4 pins. The extra pin on one row is for an additional ground.

As you've noted, the H100i only uses a single port. The Commander Pro, however, requires both ports. One of those ports is for the CoPro's internal MCU, the other is for the CoPro's USB hub.

For the H100i, you can use an extension for a single port. Just make sure that you are super-careful to line up the wiring! In fact, I've used just such an extension cable for both my H115i (both the Pro and Platinum) and my HX1200i to put both of them on a single USB 2.0 internal header.
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