The R5E/W2100 GPU configuration has a few quirks in Windows 10 LTSC.
-Both GPUs use an ancient AMD catalyst driver (currently 27.20.1034.6). There's a FirePro-branded driver package that doesn't seem to work properly with this dual GPU config
-The W2100 defaults to very annoying fan speeds. The Catalyst drivers don't have any fan/power controls for the GPUs.
-You can just download SpeedFan to manage the GPU fan. Set the fan to 10% (or even 0%) when it's not hot and 20% when it's at 75-80C and the fan will be mostly inaudible. Set SpeedFan to start minimized and add it to startup with task scheduler.
-With displayport the bios will never show on the W2100 when set to auto. If you move the cable to the R5E it shows.
-The R5E's max display output is 3840 x 2160 @ 30 Hz over DP but in Windows it defaults to 1080p @ 65 Hz and doesn't seem configurable. I've seen this issue before, you can probably fix this by adding a custom profile in Custom Resolution Utility or the AMD drivers
-W2100 does support 3840 x 2160 @ 60 Hz but performance isn't that good for the newer VP9/AV1 codecs on YouTube
@geo999 I also found a copy of the Fujitsu board tools, will try them out and report back. There is documentation for SR-IOV as a setting.
ItemID = 01A6, SR-IOV (Single Root - IO Virtualization)