I looked on Asus' site and that motherboard wasn't found for socket 478, which according to HP is the socket that motherboard uses. Check your information over again.
The HP BIOS has very limited options, I want to lower the temp threshold that speeds up the case fan as the computer freezes for a second or two each time it turns on and off. When the comp is working hard the fan is triggered every few minutes.
I can put up with it most of the time, its incredibly annoying though when playing games online though...plus the sound tends to get distorted in TOCA2, but as soon as the fan speeds up it goes normal.