some of this build is a waste of money
like for instance
2X Nvidia nForce 790i Ultra SLI ( so 2 mining rigs ) 3 graphics cards per motherboard - get an actual mining motherboard like a asrock h81 pro btc r2.0 that can support ohhh wow 6 gpus, o0o0o0o0o0

2X Intel Core2Duo E7500 cheapest i could find lol - your not looking hard enough for cheapest, anything past a dual core Pentium is a waste and is pointless and overkill
2X Samsung SSD 850 EVO 120 GB - only need 80gb ssd's can be found used on ebay for cheap
6X sli extensions - useless in mining
also the sli bridges are USELESS for mining and actually makes it worse

1000 psu isn't enough to power 3 1080ti's plus the mobo and ssd, that said 1200w psu minimum to make sure theres overhead to account for things like power surges. only an idiot would choose a psu that youd be running at 100 percent and burn it out like a fool

why is it people care not to do enough research before coming on here and asking stupid questions. if you did the research first you would have already found out that some of the hardware you've chosen is just poor choice when there is a lot better choices out there