Before overloading power supplies we always test first if the over current protection (OCP) circuit is active and at what level it is configured.

OCP kicked in when we tried to pull more than 63 A from +12 V. The label says that the +12 V output has limit of 58 A, so OCP was configured the way we like: close to the limit printed on the label.

Below you can see the maximum values we could pull from this power supply with its outputs until inside ATX specs, even though noise level at +12V2 input from our load tester was at 130 mV, a little bit above the maximum allowed. If we tried to pull a lot more current the power supply would shut down, which is terrific, meaning you won’t burn your power supply if you try to pull more than it can handle. We are not sure which protection kicked in, because since ripple was very high maybe the protection that entered in action was over voltage (OVP) or under voltage (UVP) and not over power (OPP).

Even though this power supply could deliver 811 W, overloading this unit isn’t recommended, as noise level increased a lot as mentioned and also efficiency dropped below the 80% mark.