>>3275396230hz is the european standard
you need to manually increase it in options the first time after u bought it
that is about the difference of ampere in the european electric grid, most monitors cant handle that are not fabricated specifically for the european market and would just blow their resistors
so u have to make sure you got the filter between your poweroutlet and the monitor so u can then safely increase the hz
but many people dont care and dont use filters, so thats why the 30hz is the standard factory setting
https://www.german-way.com/why-is-there-230-volt-power-in-europe-and-120-volts-in-north-america/ 