actually TDP on my 1070Ti's and P104-100's is 180W, bro. loading your PSUs to the limit isn't good thing either, better to have some power reserve remaining.
I second this.@FaourZ From the net,
Some powersupplies have "shared" +12v Rail to the regular +12v for other components making the max power label inaccurate for computing the power consumption of the videocards alone.
Most major producers however, separate the rails and using only the max power of the +12v for PCI-e power as the Rating Label.
What are the brand(s) and model(s) of your PSUs?
Unless you can't underclock like the post above me stated, plug out one of the GTX1070ti to test the miner for stability.