Custom BIOSes Harden Intel X58 Motherboards Against Meltdown and Spectre
Legendary soft-modder Regeneration released a vast collection of motherboard BIOS updates for socket LGA1366 motherboards based on Intel X58 Express chipset, because motherboard manufacturers have abandoned the 10-year old platform (yeah, it's been a decade since "Nehalem"!). The BIOSes have been made by transplanting the latest micro-code updates by Intel, which run all the way back to the 1st generation Core micro-architecture.
These are unofficial BIOSes which you use at your own risk, but they've been made by a person with more than two decades of fanfare in the PC enthusiast community, famous for unofficial, performance-enhancing NGO VGA drivers from his now defunct blog NGOHQ.com. Find the links to the BIOS of your X58 motherboard in this thread on TechPowerUp Forums (hosted externally).
These are unofficial BIOSes which you use at your own risk, but they've been made by a person with more than two decades of fanfare in the PC enthusiast community, famous for unofficial, performance-enhancing NGO VGA drivers from his now defunct blog NGOHQ.com. Find the links to the BIOS of your X58 motherboard in this thread on TechPowerUp Forums (hosted externally).