FSP is another power supply manufacturer widely used by several brands. This company may also be referred as Sparkle, Sparkle Power or simply SPI (Sparkle Power, Inc.), which is a company from the same group.
The most common tell on FSP power supplies is the name “SPI” printed on top of the transformers.
Another thing that you may find on units manufactured by this company is FSP’s logo printed on the printed circuit board.
And you can also find the name “FSP” in the beginning of the model number printed on the printed circuit board.