Yep tk is correct about the power settings.
The M3 requires about 20Watts at full speed. USB will power down as processor load increases.
@sinovoip could you guys set the install image cpu performance to lowest for the installs ?
Setting the Frequency in the fex scripts to 480mhz on all steps will do the trick.
Once installed to the emmc the normal speed backup can be restored.
If I get around to it later today I will go ahead and make a image for this guy with that change. I will post a script soon to automate the change for you @sinovoip