You would need to have something like a space heater plugged in for the extra draw of the computer to trip a breaker due to overload. Given that you've tested with different circuits, that's seems highly unlikely.
Therefore, it makes more sense to me that you have a newer house (or a newish renovation) and your breakers are touchy
AFCI breakers. In my experience, AC fans, like your range hood, bath exhaust fans, and standalone room fans, frequently cause nuisance trips with AFCI breakers. I've never had an issue with PC power supplies and AFCI breakers, but let's at least eliminate that as a possibility.
So, do you have AFCI breakers?