QUOTE(JohnLai @ Feb 22 2021, 05:42 PM)
Hmm.......just a query, do you use disk encryption on SX8200 boot drive? Bitlocker or Veracrypt?
EDIT: Have you try to turn on and off the disk caching? Cause every time after windows feature update, the disk caching functionality somehow "broken". Only turning it off and on again fixed it/
For the encryption part, if veracrypt is used.....lot of slow down......

Yes I'm using bitlocker. I'm aware of veracrypt causing slow downs, but that's a problem with the software itself since it also happens for Intel systems.
QUOTE(xxboxx @ Feb 22 2021, 07:46 PM)
Possible hardware, yes. Also more possibly is Windows problem. I give up on finding the root cause, instead as long as there's workaround I'll use it..
Example is I transfer files from PC to NAS can't maximized the bandwidth, play around with some settings and able to transfer full speed. Windows do some update then broken again.
Mount my PC drive in NAS and use NAS to do the transfer, every time can get full speed.
Now is trying to solve usb wifi intermittent disconnect on my HTPC, last time already solve it but same story, Windows update some things and it broke again.
I don't remember exactly which chipset driver update did help alleviate the issue though, but there was one which helped transfer speeds to stay above 100MB/s most of the time. But like I said, there are still the odd times where it can just drop below 40MB/s for no reason.
Either ways as long as connection don't drop when file transferring, I cukur.
QUOTE(yimingwuzere @ Feb 23 2021, 10:24 AM)
The issue I described doesn't happen when using the main NVME slot that goes directly to CPU bypassing the chipset - is that the slot you're using?
Since everyone is talking about various issues with USB/NVME/wireless etc - some B550 boards also have LAN issues when using 2.5GBe Intel chips - apparently everyone blames Intel for it though, since the issue is more prevalent on Z490.
Yes I'm using the slot that is connected directly to the CPU lanes, not going through the chipset.
The i225V intel wifi/LAN controller is mostly fixed now I hear. Believe any latest revisions on B550 shouldn't have the bandwidth bug anymore.