no it has no voltage switch heres the link to the product i had in mind, http://www.eclipsecomputers.com/product.aspx?code=PSG-460SUP
It's a 220 volt only model. It has to have some sort of PFC to be sold in Europe. And if it had active PFC,I think the ad would say so. The ad also gives no power specifications. For me , that's an automatic downcheck.
obsidian is right. The 400 watt Corsair is a better choice, and it probably has more usable power with its 30 amp 12 volt rail.
I think that the 400CX is one of the best under 500 watt PSU's around. It's worth the extra price.
Our standard checklist and troubleshooting thread:http://www.tomshardware.com/forum/261145-31-read-posting-boot-problems