I'm building a computer, but it won't boot!

I've been trying to build my first computer, it has been 8 hours, and it won't boot up after countless tries :( . The only sign i get when i turn on my psu is a green led, which is a standby power led. The psu is not faulty because i have tested it using the paper clip trick. My specs are.
Asus z77-V-LK
Msi Radeon 7950 Twin Frozr
i5 3750k
rosewill 750w psu
8g Corsair Vengence RAM

Links to some pictures with cables v
http://www.flickr.com/photos/92837523@N06/8436727297/in/photostream Sata Cables

http://www.flickr.com/photos/92837523@N06/8437810722/in/photostream Power Reset etc

http://www.flickr.com/photos/92837523@N06/8436727663/in/photostream 8 Pin Cpu Plug in

http://www.flickr.com/photos/92837523@N06/8436727735/in/photostream 6 Pin Pci

http://www.flickr.com/photos/92837523@N06/8437810872/in/photostream Specs

I tried testing using a screwdriver on the power switch with no success, and i have also replaced my thermal paste.
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  1. Welcome to Tom's Hardware Forums,
    Because of the variables at this point, I'm going to suggest this sticky as a good starting point http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
    Good luck
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