Windows 10: USB 3.0 device works like USB 2.0 slow speed

Hi team, need help please. I am on MSI GF75 Thin 9SC. and using a UGREEN M2 NVMe SSD case/ enclosure with 1TB NVMe SSD. I disabled the USB selective suspend setting, and the device started giving me decent speeds upto 460Mb/sec for a while. I installed a couple of programs on this SSD. now that I restart, it was not giving me more than 39MB/sec. I clean installed Windows 10, and for a while the case gave me 500MBps speeds, which it should on a USB 3.0 gen 1 port. Now today, when I have restarted my PC, it again is showing 30Mbps speeds, and I am unable to fix this issue, and need help from people in the know please. I dont want to fresh install window every now and then.

:)

 

USB 3.0 Question

That is the add in I have. I got it off the CM store. They also list an adapter, but I've yet to see it listed as in stock and can't seem to find any others.

 

USB 2 on bootup but USB 3 when rebooted

So you think that Windows switches your USB 3 ports to USB 2 ports at startup, and then sometime later switches them back to USB 3 ports?

Or perhaps you think that Windows intentionally, or through error, slows down your USB 3 ports to USB 2 speed at startup, and then speeds them up to USB 3 speed later on?

 

How to achieve USB 3 speeds on USB 3 ports?

I have a relatively new USB 3 hard disk:
Seagate 2TB Backup Plus Slim Portable External USB 3.0 Hard Drive (Silver)
Also, I have an USB 3 SD card reader. Both of these are known to work faster than they do now. They perform at 40-45 MB/s.

I use USB Device Tree Viewer V3.1.2 and it tells me these, for both devices:

My motherboard is ASUS MAXIMUS V GENE and it has two USB 3 options. There is ASMedia USB3.0 eXtensible Host Controller and there is also Intel(R) USB 3.0 eXtensible Host Controller. I never got any device to work at USB 3 speed on the Intel. They don't supply drivers for Windows 10 64bit as it is already included in the OS. Then I started plugging devices to the ASMedia ports, and they worked in the past. But I checked again and now all devices are using USB 2 speeds on these ports too. I think what messed it up was a recent Windows Update. I used IObit Driver Booser which complained that the driver was too old for this controller.

No joy, even tried manually installing specific drivers. ASUS has this as "latest driver" on their site: Asmedia_USB3_V1.16.35.1 I downloaded it and installed it. Install is successful:

But no USB 3 speeds whatsoever. I ran out of options to try.