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Old 24th January, 2008, 12:33 PM
Aedan Aedan is offline
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Join Date: September 2001
Location: Europe
Posts: 13,075

How are the devices connected to the computer? USB 1.1 devices connected to a USB 2.0 port communicate as USB 1.1 devices. Be careful, only devices that claim USB 2.0 Hi-Speed are actually fully USB 2.0 devices. Those that claim "Full Speed" are really only USB 1.1 devices (but that's covered under the USB 2.0 spec, so they can claim to be USB 2.0).

If they are USB 1.1 devices, then it's quite possible you have exceeded the bandwidth available.
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