I've borrowed a similar configuration many others have used for an htpc. I suppose its possible the 380W PSU ultimately will not be enough, but supposedly this configuration will not be too power hungry. One of the spares I tried with was a never used 420W. And I have considered another hdd just for the OS, possibly even a 64GB SSD, but I have disconnected the hdd altogether for now just trying to get into the BIOS. Yes, all power leads are connected, including the 24pin and 8pin are connected. Actually only half of the 8pin is connected since this motherboard only takes the 4pin. All jumpers are connected as indicated by the manual for the MB. I have hooked up speakers but still didn't hear any beeps or other noises unfortunately.
I have the bare minimum required parts connected for now (MB, CPU + onboard gfx + RAM) and I figure that should be enough to at least make its way into the BIOS or POST right?