Back in 2017, Seasonic introduced its CORE line of mainstream PSUs with 80 Plus Bronze efficiency. In 2019, the company wants to win more mainstream consumers, and hence unveiled a new line of CORE series PSUs boasting of 80 Plus Gold efficiency, partially/fully modular cabling, and ASUS TUF Gaming Alliance co-branding. The new 2019 CORE series come in various mid-range capacities starting from 450W, to 550W, 650W, leading up to 750W. The ones shown at Computex were 450W with partially-modular cabling and 650W with fully-modular cabling.

The new CORE series PSUs are built with compact 14 cm long bodies, and a new 120 mm fan that can stay completely off under a load/temperature threshold. The innards of these PSUs are new, with a few segment-first features such as DC-to-DC switching, and tight (±4%) voltage regulation across all three domains. There is a single +12V rail design, and an active-PFC component. Most common electrical protections are included, such as over/under-voltage, overload, overheat, and short-circuit protection. Seasonic is backing these PSUs with 7-year warranties.