The ASUS anti-surge feature activates when it notices fluctuations in the PSU voltage that are outside the norm. There are several hardware/physical related issues that could be contributing to this.
1.) Your PSU may be one foot in the grave, and is unable to regulate the voltage, which is tripping the anti-surge.
2.) You've added new hardware, which requires more total voltage/wattage than the PSU is able to supply properly, so the fluctuations are tripping the anti-surge.
3.) The physical wall socket (or surge protector/power strip/whatever you have, if you have anything) has gone bad, likely due to a power surge, or old/faulty wiring, and is in turn, sending a fluctuation of power into the PSU, which in turn into the computer, tripping the anti-surge.
These are the more common issues that would trigger an anti-surge "crash". Has anything physical (hardware) been added/changed with your PC in relation to the issues?