Some of these products requires more than 1A of
power, however the USB 2.0 is only able to deliver
a maximum of 500mA (.5A), which is not enough to
power if it exceeds 500mA.
3.0 is designed for devices which need high power.
The preset value cannot exceed 5.0 A for most products
designed to use the USB 3.0 Power connectors. Products
using USB Power are designed to shut down the power
if it exceeds the 5A limit. However some manufacturers
in order to be on the safe side, may set the limit
developed motherboards with 3x USB Power Supply
general, a USB 2.0 hub port has a current limitation
of 500mA, but some new products with GIGABYTE motherboards
are equipped with 3x USB Power supply which is able
to provide 1.5A for each USB 2.0 port. Additionally,
USB 3.0 hub ports, moreover the USB3.0 hub port
can even provide up to 2.7A of power for USB 3.0
devices. With this new Gigabit motherboard there
is are two USB 3.0 ports which are able to provide
a total of 5.4A of power.
faster USB 3.0 already planned?
A rather surprising announcement was made during
CES 2013 that the official USB promoter group has
a grand plan to double speed of USB 3.0 to 10Gbps
from current 4.8Gbps. This is a clear response to
the threat of Thunderbolt which is still slow at
gaining traction. The new standard is called USB
3.1. The USB 3.1 will operate with existing connectors,
yet new cables may not be needed which will be capable
of operating at 10Gbps. There will even be improved
data-encoding efficiency for applications like video
and audio. Software stacks and class protocols will
also work seamlessly.
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