PC Build intermittently loses power

My apologies if this is not in the correct forum, I'm new here.

My build: http://pcpartpicker.com/p/JJYdMp

When I power it on, the fans all spin, this lasts for about 5 seconds.

They then stop for about 3 seconds, then begin spinning again.

This cycle continues until the power is cut.

Any Help or advice would be appreciated.

Solved my own issue, I had failed to connect the 4/8-pin ATX12V/EPS12V Power Connector.

that was easy ... WTG