MSI GS66 Stealth write speed to portable SSD and flash drives suddenly slowed significantly to around 2MBPS max. (the update window will have a high write speed for about 3 seconds then quickly adjust to the 2MBPS range)
Things I have tried:
Different Cables
- Currently using a USB 3-2 Gen2x2 compatible cable
Device Manager
- Uninstalling USB Root devices (with reboot).
- Uninstalled all Disc drives and Universal Serial Bus controllers.
- Targeted SSD -> "Quick Removal" to "Better Performance."
- Checked: "Enabled write caching on the device."
- Checked and Unchecked: "Turn off windows write-cache buffer…"
- Unchecked: Power Manager option "Allow the computer to turn off this device to save power"
- Targeted SSD
- Disk Drives -> "Samsung PSSD T7 Shield..." -> Policies
- Set to better performance->checked Enable With caching on the device"
- Disk Drives -> "Samsung PSSD T7 Shield..." -> Policies
- Uninstalling USB Root devices (with reboot).
Power mode set to "Best Performance."
Thunderbolt device driver update.
BIOS reset.
Windows Reset (keep files).
An SSD (T7 Shield)
- Updating SSD firmware
Multiple USB-C flash drives
Every port USB - C and USB - A
EC Reset
USB-C on another computer
- Speed was faster (still seemed slow but would fluctuate between 3mbps to 50mbps not 150kbps to 2mpbs)
Samsung Magician benchmark test results:
- ~950 Mb/s Sequential Read.
- 1 Mb/s Sequential Write.
- 22705 IOPS Random Read.
- 488 IOPS Random Write.
I am unsure what has changed but 2 Mbps is unusable.
I would say two more things:
winsatshows much better performance of 64 Mbps.- This is a difference in performance not an expectation at first attempt. I have done this backup on a monthly basis. Today it is much slower. I am thinking that maybe I had a hardware failure but at this point I am unsure because the
winsatshows improvements over 2 Mbps?