A:AnswerFor a dual monitor set up you will want to have a GPU installed. The computer is not designed to use both ports for two high resolution displays.
A:AnswerFinally received a photo of the chassis.
The actual PSU is NOT a standard ATX 24 pin unit.
It utilizes a 2x3 and 2x2 plug for power. There is also a inline 6 pin.
SATA hard drives are powered from a header on the motherboard.
This type of arrangement bemoans the old classic Business models of the HP 6300 and HP 8000 series Business Class motherboards.
HP Team ?? You need to research first.
wb2001 (Senior member HP forums)