This is an excellent entry-level power supply, with efficiency between 84% and 85% if you pull between 40% and 80% from its maximum load (between 180 W and 360 W). During light load (20% load, i.e. 90 W) and full load (450 W) efficiency was at 82.5%, still above 80% and fair enough for an entry-level product. We wonder why other manufacturers don’t follow Thermaltake’s steps and release really high-efficiency products for this market segment. In other words, why high-efficiency should be only seen on high-end and expensive products?

But of course not everything is perfect, and even Litepower 450 W has its drawbacks, which are the presence of only one ATX12V connector with no EPS12V support and all SATA power cables being located on the same cable, what can make it difficult to install SATA optical drives and SATA hard drives on the same cable, depending on the size of your case and on which bays you decide to install these units.

If these limitations don’t bother you, this is a terrific buy for building a high-efficiency mainstream PC (translation: lower electricity bill compared to PCs built with traditional low-end power supplies).