Ok, i've just assembled the build in "my system"
When i turned it on, it would turn on and off itself 3 times, then stay on. There was a red LED and a green LED (i think) turned on on the mobo, the green lights on my 9800gx2 were also on so i'm not entirely sure about the green light from the mobo.
Anyway, I wasn't getting any picture from my monitor, so i tried adjusting the graphics card so the dvi cable would plug into it more (i wasn't sure it was plugged in properly. After adjusting the graphics card and moving it a little, everything powered down and i can't turn it back on. I tried turning the psu on and off (switch @ back), using different plugs in my wall, taking out the power on switch header from the mobo and reinserting and also resetting the cmos. My comp still won't turn on.
Attached is a pic of my setup (man I hate the fan clips on the TRUE, can't get them to hold the fan properly)