in my experience, i have no idea
the little experience i have with HP goes way back to a little 400mhz POS, but given that they are HP they cut corners and save money everywhere they can, so the PSU may be only enough for the PC
heres the req:
Minimum of a 350 Watt power supply.
(Minimum recommended power supply with +12 Volt current rating of 22 Amp Amps.)
the pc SHOULD have that much as its pretty low, but again its HP you never know