system
A chat on subreddit /r/pcmasterrace
human
Proprietary PSU. Cannot be replaced.
gpt
It can be replaced direct from HP. You can purchase a higher wattage PSU from HP... like a 650w silver i believe is what they have available. There are youtube videos a people upgrading HP pre-builds, but the modifications are limited for sure. But would allow for other GPU options in the the future.