I can say from my own experience that , I have updated bios with every revision. I did this because , I am going to upgrade to Vishera 8350 that is when they get around to releasing it. ( Who knows ? ). They say it will out in OCT. ( Middle of the month , I think full of S _ _ T). Anyway , I have upgraded to 1503 with out any problems. I can not see difference in performance. I just wanted the latest bios installed on my Sabertooth 990fx when piledriver does get released. Just hope it is not like the Bulldozer release. Do Not promise what you can not deliver. According to road map 3rd Quarter 2012. We will see.