You're not even close to a typical current overload situation. Let's look at the math involved here...
Here's a very useful page...so useful, in fact, you might want to bookmark it: https://www.rapidtables.com/calc/electric/watt-volt-amp-calculator.html All you do is enter two known values, and the calculator fills in the rest according to basic electrical physics. So, in the case of the 1 kW PC PSU, you'd enter 117 V for the voltage, 1000 watts for the consumption in watts, and you get 8.5 amps (and change).
Now, armed with that website widget, start calculating your TOTAL amperage draw for your ENTIRE music rig. Then check your breaker panel and make sure that whatever circuit you use is capable of handling the amperage load. My bet is that you're just fine; solid-state electronics such as what's in music gear doesn't tend to have much of a current draw when compared to motorized devices, devices that involve high voltage step-ups, and the like. In fact, your biggest "amp hog" is probably going to be the main monitor amplifier.