Let’s take a look at this 850 W power supply from Sentey, which comes with the standard 80 Plus certification, but uses resonant configuration in its primary and DC-DC and synchronous designs in its secondary, features only found on high-efficiency power supplies.

Here is a snippet: "The Sentey Solid Power SS series of power supplies has 550 W, 650 W, 750 W, and 850 W models, all with the standard 80 Plus certification. Today we are going to dissect the 850 W model (SDP850-SS), which uses a resonant configuration in its primary and DC-DC and synchronous designs in its secondary, features that are usually only seen on high-efficiency power supplies with at least the 80 Plus Bronze certification. Let's see if we were surprised by this product."



Link: Hardwaresecrets