Hi,
If you have a jumper ezbook 3 pro V5 bios, get a bios mod with all options and full power limits in my google drive: https://drive.google.com/open?id=1TYLcH4usMEQF_vKRN0UTjzRD5QqTproP
Caution, this mod is only for V5 bios, downgrade or upgrade is a serious brick risk, compare a date of file rom with date of your bios.
If you have another bios version and need help, send me a rom and i help to unlock.
ps: Credits for hard work to unlock BIOS to Giovanni and @moetm in techtablets.com.
Regards.
Aderbal (São Paulo - Brazil)