i have computer asus p6x58d motherboard, usb3.0 , know ipad can't charge via usb2.0 unless high powered 1 or something, since usb3.0 puts out more power (or i've heard) able charge ipad via that?
pick later today , wondering on situation...
4. other improvements usb 3.0 provide?
enhancements superspeed usb not higher data rates, improving interaction between device , host computer. while core architectural elements inherited before, several changes made support dual bus arrangement, , several more notable how users can experience improvement usb 3.0 makes on usb 2.0:
* more power when needed
o 50% more power provided unconfigured or suspended devices (150 ma 100 ma), , 80% more power available configured devices (900 ma 500 ma). means more power-hungry devices bus powered, , battery powered devices charged using bus power potentially charge more quickly.
o new powered-b receptable defined 2 contacts enable devices provide 1000 ma device, such wireless usb adapter. eliminates need power supply accompany wireless adapter...coming bit closer ideal system of wireless link without wires (not power). in regular wired usb connections host or hub, these 2 contacts not used.
* less power when it's not needed
power efficiency key objective in move usb 3.0. examples of more efficient use of power are:
o link level power management, means either host computer or device can initiate power savings state when idle
o ability links enter progressively lower power management states when link partners idle
o continuous device polling eliminated
o broadcast packet transmission through hubs eliminated
o device , individual function level suspend capabilities allow devices remove power all, or portions of circuitry not in use
source: superspeed usb 3.0 faq
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