: The board supports up to 256GB of DDR4 ECC RAM . Remember: You cannot mix Server (ECC) and Desktop memory.
Flashing requires care. Using an external programmer like the CH341A is recommended, but ensure it is operating at 3.3V to avoid damaging the BIOS chip. Machinist X99 MR9A PRO: Full Review - Old Rig Revive machinist x99 mr9a pro bios exclusive
Look for machinist_x99_mr9a_pro_bios_exclusive.zip on archive.org or join the “Machinist Owners” Telegram group for direct BIOS files. : The board supports up to 256GB of DDR4 ECC RAM