It seems you have everything plugged in correctly as far as I can tell. You should really take the entire motherboard out of the case and place it on a flat surface, disconnect all the LED and power/reset switch cables from the case, reseat your CPU, reseat your RAM, install the CPU fan, connect to your power supply, and turn it on by using a
screwdriver to short the 2 power switch pins, and see if it stays on (you can use the CPU fan as indicator, as long as it spins, then the system stays on). If it does stay on, put in your video card, connect the 2 power adapters to it, and turn it on to see if you see the screen.
This is a crappy
picture but this is how I initially tested my parts before I spend the time to install them into the case. Just nothing but the motherboard, power supply, video card, RAM, CPU, and CPU fan.
Oh be sure to rip open those 2 thin metal plates above your
USB ports off so you can plug your network cable in O_O