i have a phenom II 925 (stock 2.8) overclocking to 3.5 requires i bump the voltage to around 1.43v, increasing the power draw to around 140w. while a 940 should be able to do it with very little or no over volting, i do believe that psu will be able to handle a overclock that small with ease. your computer will probably only pull ~250w of power with the specs you have posted.
Yeah, thats what I was thinking, I can get 3608mhz with out any extra voltage, it does on 1.34v and at times hits 1.36v. CPU-NB it at 2207mhz or something like that without any voltage, I'd like to get that up more along with better ram timings.