i made this tutorial for those having trouble with downgrading their bios :Check the tutorial from here :
http://smarttechtips.blogspot.com/2012/08/how-to-donwngrade-asus-bios.html
tested on p8p67 Deluxe . (Downgraded from 3207 to 2103 Successfully) (dram speed and cpu ratio are adjustable after downgrading )
and let me know if you need any help ,
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