Youre a newbie so i will give you the benefit of the doubt and appreciate your thorough reponse. But at the current OC settings and a 60%power limit set, each card only draws 70-75w (as i have already said, twice)
I think you need to bare in mind that people mining with cards will inevitably not have them set to use the 100% of their rated power consumption.
Apologies, definitely not trolling just trying to help. I might've misunderstood your first post thinking you mentioned the 6-pin's designed power draw rather than the GPU's power draw.
I still stand by what I said earlier though, feel free to correct me if you think these numbers are wrong. Source is wikipedia:
https://en.wikipedia.org/wiki/PCI_Express#Power.
6-pin max designed power draw: 75W
GPU power draw (sourced from your post): 70-75W
PCI-E riser power draw: ~10W (I don't know the exact draw for a 1060 so to be on the safe side I'm using what the slot is designed for)
Given that, if you split the 6-pin your draw would be 80-85W, and the 6-pin is designed for 75W. Could you run this? Maybe. My opinion is I wouldn't. I'll leave the floor open for other opinions.
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Edit since it looks like your post changed:
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So how comes the 1200w antminers use 10 6pin connectors and rarely have failures (considering the thousands of machines they have made).
Ah, ok. The difference is your PSU can handle the power, but not that single cable. It's like a weakest link thing. Rather than splitting the 6-pin you want to have a completely separate 6 pin cable. What'll end up happening is if you try to draw more than the spec'd wattage from any cable it'll get hot and possibly start melting things. Or catch fire. I don't work with server PSUs and breakout boards, but maybe adding a cable is something you could do instead of getting a splitter and drawing more than a single cable is designed for.