qian.mx XIAO PC User Manual page 60

battery back work, everything will runs normal now.
F: I lost the drivers, what to do if I want to reinstall the system?
A: You can find drivers from our company website http://www.qian.mx or
use software tools to get driver directly, or welcome to contact Qian tech-
nical support about drivers download.
F: Why my internet get not stable when I plug the USB flash or exter-
nal USB DVD to the USB 2.0 Port on the mini pc, but internet stable
when plug the same usb products to the USB 3.0 port in the same
mini pc, what happen?
A:
This problem most due to USB power supply different, USB 2.0 port can
supply max 500mA but usb 3.0 can supply up to 900mA, so if your USB
products require more than 500ma and less than 900ma, it will not be sta-
ble on the USB 2.0 port but stable on the USB 3.0 port. And USB problem
on the motherboard will hurt the Lan chip power supply, that's why the
internet get not stable if you plug usb products to USB 2.0.
USB 2.0 vs USB 3.0
USB 3.0, the latest version of USB (Universal Serial Bus), provides better
speed and more efficient power management than USB 2.0. USB 3.0 is
backward compatible with USB 2.0 devices; however, data transfer speeds
are limited to USB 2.0 levels when these devices inter-operate.
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