I know a computer PSU can take 110-220v AC input, but I see a 125v rating on the power cord. If I'm going to use this computer overseas, should I get other power cord?
A PSU can only take 110-220(should be 240...) IF the PSU specifies that it can. Do not ever ever assume it can handle both. Cords do not matter, the rating on the PSU/power adapter [of anything] is what matters. As for Blue Fox's mention of the plug on the end, all you need is a cheapo $1? prong adapter. Again, do NOT assume it can do 110v-240v.