Purchased March 2013
XPS 8500 Special Edition (white case)
Windows 7 Professional, 64-Bit
i7-3770 CPU @ 3.40GHz
Intel(R) 7 Series/C216 Chipset
2 x front USB 3.0 (blue) ports operational at USB 3 speeds
2 x top USB 2 ports operational at USB 2 speeds
4 x rear USB 2 ports operational at USB 2 speeds
1 x rear USB 3.0 (blue) port unrecognized
1 x rear USB 3.0 (blue) port operational at USB 2 speeds
Had only used the two front USB 3.0 ports until recently and they've both worked flawlessly. Have now tested the two rear USB 3.0 ports and one is undetected when USB 3.0 thumb drive inserted. The other port is detected, but only operates at USB 2 speeds (and I get Windows 7 popup notification saying that "This device can perform faster" if connected to a Super-Speed USB 3.0 port).
The installed Intel USB 3.0 eXtensible Host Controller Driver was version 188.8.131.52 until I installed (downgraded to) Chipset_Driver_RW99K_WN_184.108.40.206_A00 from Drivers & Downloads, which is the only one listed as available for my system (which is odd). In any case, the rear USB 3.0 port behavior is the same, regardless of which version is installed.
I've also updated the system BIOS to version A12, updated NVIDIA drivers, verified that USB selective suspend settings are Disabled, disconnected all other USB devices, etc., but nothing helps. I've even run the Intel Driver Update Utility, which returns no results.
Is there anything else I can do to resurrect these two ports?! I've ordered a couple of USB 3.0 external hard drives and had planned on connecting them to the rear ports. I've searched the Dell forums and have noticed other references to this problem, but have found no definitive solution. I know this is an old system (and topic), but any suggestions would be appreciated. emoticon.Wink.title