From the specifications:
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This is for 5V power input, with an inner diameter of 0.8mm, and an outer diameter of 2.5mm. The ODROID-C1 consumes less than 0.5A in most cases, but it can climb to 2A if many passive USB peripherals are attached directly to the main board.
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If you're not using any USB devices, you can probably get by with the 0.5A rail on the VRM. If you are using USB devices, plan accordingly.