they show the configurable options available to this particular machine. The power supply is fixed at 350 W, and probably a generic stock psu at that. If you go to graphics, you will see the option of a radeon hd4850.
Can anyone with this machine confirm that they have a 350W psu with the 4850 card? I'm just curious because I never imagined that a generic 350W psu would be ample for a 4850 card.. I want to know since hp may ship me this unit, and I want to upgrade it to a 5770 which has less power draw than the 4850.
So yes, a PSU actually capable of 350W continuous load would be safe enough. We would never recommend such but in the world of pre-builts they like to cut things close and save every dollar they can. That said their PSUs usually do operate within ATX specs, so no worries.