We have chosen a conservative amount of power to use so that the software can be run while multitasking with other applications. 

The mileage may vary depending on the machine but so far from our feedback we've received and with our testing, there is a lot of headroom to do a lot things while the software is running. 

If you're doing anything intense we'd recommend getting a software to read your CPU and GPU temperatures (although we only use one of the two). CPU-Z and GPU-Z are great for this.