Meaning_Raptor :
Just want to know if that will harm the PSU or something. I shut down before I unplug it though.
Wall receptacles (unlike those used in the kitchen) have a shorter 'make and break' life expectancy.
Facilities that routinely operate without damage during all storms use a different and well proven solution. If your computer is at risk, then so are other appliances including radios, dishwasher, CFL and LED bulbs, air conditioner, clocks, and most important - smoke detectors. What have you done to protect GFCIs?\
Destructive surges occur typically once every seven year. A number that can vary significantly even in the same town due to things such as geology. How many times a week are you replacing bathroom and kitchen GFCIs - that are not even as robust as the computer?
Telco switching computers suffer about 100 surges with each storm. How often is your town without phone service for four days while they replace that computer? Never. Because they do not use adjacent protectors that can sometimes even make damage easier. Instead, a 'whole house' protector is connected low impedance (ie 'less than 10 feet') to single point earth ground. Then direct lightning strikes do not even damage the protector.
Superior protection for everything costs about $1 per protected appliance. Even power bar protectors need protection only possible by earthing one 'whole house' solution. But most important. Protectors do not do protection. Protectors only connect to what does the protection - where hundreds of thousands of joules are harmlessly absorbed. Single point earth ground. Protectors are simple dumb science. Protection is the 'art'. A protector is only as effective as its earth ground. Facilities implement this because even unplugging is too unreliable - and unnecessary.