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My notebook is Asus U46E has one USB3 port. I tested the write speed of USB3 in Ubuntu, it's fast as my expectation without doing anything. But when I go to Win8, the data was written in not-right-speed of USB3. I had tried to install drivers from Asus. It's still the same.

EDIT: In the benchmark, I see the read speed is good. Write speed did not pass 15MB/s.

p1 Drivers p3 p4 bmark

Any suggestion?

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Try the latest driver version from here:

And I also have this USB controller and I can say that this one is a 1st generation controller which has some issues (that's why MS doesn't use the new USB 3.0 drivers from Windows 8 for this USB controller).

Maybe the Linux drivers have fixed the issues and that's why you see the good speed.

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I have installed the latest one from Fresco. But I still got the same issue. I hope they can fix this soon. – anhtran Apr 24 '13 at 4:31
look if you have activated the Write Cache in the device manager for your USB 3.0 device. – magicandre1981 Apr 24 '13 at 4:33

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