Supermicro has put up a page detailing BIOS updates for their motherboards to mitigate spectre, meltdown, etc. There is a lot of "pending" for anything older than X11 series.
Security Vulnerabilities Regarding Side Channel Speculative Execution and Indirect Branch Prediction Information Disclosure (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754)
Security Vulnerabilities Regarding Side Channel Speculative Execution and Indirect Branch Prediction Information Disclosure (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754)