CompuServe Messages

I've just purchased a power pro 601 board to use in my Quadra 800. Haven't installed it yet, but I notice in the user manual (pg.54) it says to that system 7.1.2 is contained in the power pro software and should be used to update earlier versions so as to take advantage of power pc capabilities. On the box it says 7.5 is required. Can it run using just 7.1.2, or is this outdated? Also, is 7.5 prone to crashes (compared to 7.1)? Any advice here appreciated.