I have a Gigabyte EP45-UD3P motherboard, and it will not charge my iPad/iPad2 over the USB port. It is definitely putting out power since it chargers my iPhone. I used a Voltmeter and it's putting out about 5.04V. If I plug it in to my MacBook Air, it charges without a problem. I checked the power out of the MacBook Air and it's 5.14V. Is that little extra 0.1V the difference in charging here?