The revised FOCUS PX and GX series is the successor to the FOCUS PLUS series, which quickly became one of the most popular power supplies on the market after its launch in 2017. In 2019, Seasonic engineers made several improvements to the successful series, such as removing the inline capacitors from the included cables. In addition to the name change of the series, the power supply casing and packaging were also redesigned to better reflect the concept of the OneSeasonic initiative.