I put it and it seemed as if the technique became easier to work with. The compudachter does not spin the coolers so zealously when turned on, and the monitor turns on without a loud "buzz" because of the speakers inserted into it. I caught a couple of power surges, the flight is stable. There are also suspicions that the refrigerator in the kitchen had a detrimental effect on the PC. I do not know how to explain, not a techie. BUT now if the hair dryer works, it freezes cold, the vacuum cleaner and the washing machine - the computer is stable. (naturally, all of the above is not plugged into the UPS, but into its sockets)