|"No did not benchtest the kit. Was assuming all new kit would be good to go"|
Was it preassembled or was it individual parts that YOU assembled? Have you ever built a computer before?
"my video card is an Nvidia 8800GTX. Again it has power as well. Am I right in assuming being a new system that I will need to attach monitor to VGA output on motherboard?"
I think that question answers my question...lol.
If you have an 8800GTX, why would you connect the monitor to the motherboard? Take out the video card, leave the monitor connected as it is, then try booting up.