As you know by now, before overloading a power supply we like to see if the over current protection is active and its trigger point. Do test this we set current at +12V1 at 1 A and increased current on +12V2 until the power supply shut down. This happened when we tried to pull more than 18 A from the +12V2 rail. It was nice to see the OCP circuit configured at a value close to what is printed on the label (16 A).

Then starting from test five we increased current on all outputs until we reached the maximum the power supply could deliver still working inside ATX specs. The result you can see below. If we increased one amp on any output the power supply would shut down.

The main goal of our overload test is to see if the power supply burns or explodes and if its protections are active. Thus ASUS U-65GA passed this test.

Even though ASUS U-65GA has its protections working well, we could only overload this unit 8% from its labeled value, and under this maximum overloading voltages at +5 V and +3.3 V outputs were out of spec. Of course you should not operate this unit above 650 W.