GA Z170MX G5 - USB3 ports run at USB2 speeds on resume

[niczoom]

I have a Gigabyte Z170MX Gaming 5 motherboard v1.0

After waking from sleep all my USB3.0 ports are running at USB2.0 speeds (confirmed using USBDeview from nirsoft), the 2 yellow USB2.0 ports at the rear are still working and the single (red) USB3.1 port at the rear is still working and AT full speed and does not seem to be affected by this issue.

From a clean boot all USB ports are working as expected at their correct speeds.

I'm using the following devices to test the USB speeds (using USBDeview from nirsoft):
1. Transcend (TS-RDF5) USB3 SD card reader (with 64GB Sandisk Xtreme Pro)
2. 2x TOURO 1TB USB3 external drives.
3. 32GB USB3 Sandisk Ulta 32GB

Things I have tried:
• I dont have any conflicts in the device manager
• I have reset my motherboards CMOS
• I have removed an older PCIe tv tuner card (as possible conflict)
• I removed my twin USB3 front panel from the internal motherboard headers
• Unchecking 'Allow the computer to turn off this device to save power' in all usb hubs/controllers

Still the same result ..... USB3 ports running at USB2 speeds after waking from sleep.

Any ideas of what do try/do next to fix this issue?

[shadowsports]

You didn't say what OS you were using.  Assume 10?  While this could be related to BIOS rev...  more likely its microsoft's USB driver in the OS.  Removing all USB connections from the boards headers was a good troubleshooting step. 

Is the nirsoft program the only app telling you USB is operating at a reduced speed?  Does the OS report this? 

What's happens if you disconnect/reconnect a device after resume from sleep?  Does it then operate at full speed.  I'd recommend performing your own tests to verify connection speed and bandwidth, and not rely on software,  which I don't believe does benchmarking.  Or does it?