Received this to replace a failed Changliang PSU in my Ender 5 Plus. You can tell it's DC when the fan hums on the stable G436. . The fan will also turn on/off depending on the temperature of the heated table. The only problem is that it's not a 1:1 replacement with a standard PSU, but that's nobody's fault. 5/5 because my prints come out nice and easy now. .