DX79SI USB 3.0 Port versus Sandisk 3.0 USB Stick

Hello,

mynewSandiskExtremeCruzer64 GBUSB 3.0Flash DriveStickdoes not workon my Intel DX79SI motherboard. The Stick will be onlyrecognized as USB2.0 by the blue USB 3.0 port. Transfer data atonly39MB/ s

After Diagnose, Sandisk Support can´t help, but otherUSB 3.0driveswork perfectly.

Please help me.

ThankgreetingFranke