Question I applied RMA for motherboard X9DRG-HF and the replacement I received is with PCB rev. 1.20 instead of my earlier board with PCB rev. 1.02. I would like to downgrade the BIOS on the replacement board to the earlier BIOS version that I had been using. Is there any concern? Answer For PCB rev. 1.20, you need to at least update to BIOS 2.0b(2013/5/2) or above and IPMI firmware 2.28 or above. Otherwise, your motherboard may not work. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) X N H F FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 21040 BIOS: - BIOS Update 06/29/15     Print Answer