You both don't need to.Can you please share a link to the beta bios page
Just grab the latest BMC and IPMI off their download page and those will give you fan settings.
to actually answer your question. Yes I have. I've used the raw commands to do it and they work fine. I used supermicro's windows `SMCIPMITool` to do it
.\SMCIPMITool.exe 192.168.4.102 admin admin ipmi raw 3a 01 20 20 20 20 20 20 20 20