I was expecting the S9 to arrive in Jan 2018 but it arrived much sooner (yay!
).
Problem is I'm not prepared yet to power it at 220v as is suggested for the APW3++ power supply. For the moment I only have 110v.
If I were to attempt to power it using 110v would it result in damage to the miner/power supply? Or would it simply run at a less efficient rate?
It may work, but you can also burn your power supply, with some extra bad luck your miner could go down with it. The failure rate of these machines is already high (meaning they are pretty low quality) so I wouldn't push it beyond specs. If you really can't wait for your 220v installation you could buy a 1600W 110V PSU (and then resell it, return it, whatever).
Edit: And yes, use only two boards is an option too, that's how I'm running mine but just because one board lasted only 4 days...