No. The cpu will only use what it needs. You could set offset voltage for a full 1.0v and it'll still only use what it needs, not what you give it at idle. The difference comes with loads, as you increase the OC, the cpu thinks it'll need slightly more to remain stable, but there's no way of guessing just how much it'll actually use. That's what makes programs such as CPU-Z so important to use when looking at voltages. My i5 stock, sets @1.25v as max under load, uses 1.108v, so I can lower vcore down to 1.114 and still be good. Lowering it to 1.108 and the cpu thinks it needs less to run, so actually runs at 1.004v and sits there happily unless I push the cpu, in which case it bluescreens since reality is it needs 1.108v for stability. Most of what OC is about isn't just adding voltage to get higher speeds, it's about lowering voltages to accommodate higher speeds. Lower vcore = lower temps.
At stock settings, with stock voltages and speed step etc still active, for a small OC generally you'll require nothing more than setting the multiplier higher and setting it across all the cores.
I've found with my Asus pc, AiSuite is next to worthless except for 1 thing, fanXpert. It's the best by far fan control software there is for most pc's, far easier to use than SpeedFan, although with its tailor ability, SpeedFan can do things fanXpert can't. That's if you can figure out how to use it.