Just a add on going from 115-230 is only made for your PSU, most PSU today WILL NOT cause your entire computer to burn out if you go from 115-230 on a 115 outlet because the ampage or somthing is lower therefor even though the volts are higher, the amps don't kill it. Trust me i'v etried it
230-115 is a completely different story. Basically its like your CPU running smoothly along at IDK the true numbers say say 3 AMPS, well double that up and its like a defirblator just hit your heart, I know if that happened to my PC i'd want to be shocked just as well because it'd be a $$$ repair build.
To sum it up
115-230, at worst burns your PSU out, don't test me.
230-115 well if you really want to do this give me your CPU, Mobo, GPU, and Ram before you do it, Harddrives, and CD/DVD burners are accepted as well.