With its PL-D series, Deepcool is the first to provide ATX v3.1 PSUs at a very low cost. Both the PL800D and the PL750D, which I have already reviewed, did fairly well considering their price tags. Older designs find it difficult to meet PCIe 5.1 CEM requirements by producing 200% of their maximum power, but Helly Technology does it. Four members make up the PL-D line, and their capacities range from 550W to 800W. I will assess the third line member in this review.