Hello,
I own a HP Spectre XT 2100ea which is designed for and comes pre-installed with Windows 8. I haven't ever owned a USB 3 device up until now, my friend purchased me a Western Digital MyBook (which comes with the special blue usb 3 cable)
So here's where the problems began. The drive was just operating at USB 2 speeds. I messed around installing various community hacks and fixes to install the Windows 7 drivers into my Windows 8 operating system. This made no difference, the drive still ran at USB 2 speeds.
I decided to use the HP Recovery partition to just go back to a fresh build of my laptop, but this failed and took out my Windows 8 install.
HP are sending me a USB recovery set which should arrive in a few weeks. In the meantime I've installed Windows 7 x64 by using the have disk driver method to get Windows 7 working (if anyone wants to know how, I can write a small guide)
I've put all my drivers in place, everything working fine but even in Windows 7 64bit I'm still only getting USB 2 speeds!
I was just hoping this was a Windows 7 issue but it seems to be a generic across the board Windows driver issue.
I am using the intel drivers (Intel® USB 3.0 eXtensible Host Controller Drivers)
Below is how my devices are looking by connection, I don't know why it's using the Generic HUB and not the USB 3 hub.
I installed Ubuntu 12.10 which detected and ran at USB 3 (above USB2) speeds no problem (55mb/s)
TLDR: Windows 7 64bit USB 3 not working, works in Linux.
Thanks for reading.