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hi friends...can usb 3.0 ports provide usb 3.0 speed(or atleast better speed than usb 2.0) to usb 2.0 devices inserted to them.I had heard about transcend's usb 3.0 express card adapter which can provide 2 usb 3.0 ports to laptops which have only usb 2.0 ports. so we get this superspeed only if usb 3 devices are inserted into these ports or will usb 2 devices do?