From time to time, we like to buy power supplies below USD 30 to see how they stack up against more expensive models from better-known companies. The TiVECO TVPS450, which is also sold in the US as ePower TVPS450, is a 450 W power supply that costs only USD 20, with the manufacturer promising that it can deliver its labeled wattage at 50C and 80 percent minimum efficiency. Is that really true?
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