i don't see a "revision" on the asus site, only thing i noticed that was diff is 1 shows memory 3000, and the other 3300 in the description
http://www.amazon.com/RAMPAGE-EXTRE...116160&sr=1-2&keywords=asus+rampage+v+extreme
http://www.amazon.com/2011-3-Mother...116160&sr=1-1&keywords=asus+rampage+v+extreme
http://www.amazon.com/RAMPAGE-EXTRE...116160&sr=1-2&keywords=asus+rampage+v+extreme
http://www.amazon.com/2011-3-Mother...116160&sr=1-1&keywords=asus+rampage+v+extreme