I'm curious as to WHY people think these are necessary? The only thing they give in addition to good surge suppression is temporary uninterruption in power supply. If you have decent power supply in your area, the chances are very slim that a power surge will cause damage. A standard surge suppressor will handle almost anything including lightning. Most likely to happen would be a power outage during a disk process like writing to hard disk or probably the worst would be while flashing firmware, bios, etc. They are indeed nice of you do a lot of flashing and have many brown outs/power outages, but hardly necessary. I have a good surge suppressor with maximum suppression you can get and $100,000 damage insurance with it, so if in the very slim likelyhood anything did happen, I would be getting a FREE computer upgrade. :P
