I had read many favorable reviews of The Tagan power supplies, which led me to purchase the TG480 back in July 2004. Shortly after installing it I had a brown out and my 700VA UPS was unable to power the computer. I began to email tech support concerning the problem. I sent several emails over a 6-week period with no response. Almost two months later they finally responded telling me that the TG480 needs 685 watts or at least a 1200VA UPS. So I purchased a 1500VA UPS by Powercom, from NewEgg. UPS power still will not work with this power supply. Many emails to Tagan since, the last one being on 10\06, I have yet to receive a reply. I feel I have given them more than enough chance to make good on a defective product. Buyer beware, your on your own if you purchase anything from Tagan.