im using this PSU http://www.conversense.net/power-supply/24-fsp-super-sonic-500 my pc experienced a brown out for the first time and i was very worried that it won't open or something. can my PSU protect my pc from these kind of things? or do i need an AVR? what AVR can you suggest? can i use an AVR even if i have this PSU? or will there be problems?