Extension cord safety concerns with a pc

So I have a pc with a 1000watt psu I am moving and I will not be able to directly plug it into a wall so I did some research on extension cords and ended up getting a 20amp extension cord it’s a 6ft 12 AWG cord with a ETL safety rating I wanted to ask if this is a safe permanent solution to powering my pc the extension cord will be plugged directly into the wall and the pc will be the only thing plugged into it