WELCOME TO OC FORUMS!! now about your post, the rev 1 uses winbond ch-5, which are incredibly voltage hungry, where the rev 2 uses samsungs well know TCCD chip. and the difference between those is like night and day, or volt mod and no volt mod. ch-5 flourishes in high volts(3.2+V) where as tccd, to an extent, is voltage intollerant.