Re: [b]HELP : Correct way to power risers ?[/b]

First of all, do not use SATA. Use either molex or PCI-E. I suppose there is one card now, when you will have more, I think you should go for a modular PSU.

No I am gonna power 12 1050ti with 2 Antec Classic 750W (non-modular, gold). I will start slowly of course, one by one, observing and learning.

You arent going to be able to power everything with a 750w 80% efficient power supply. 80% (. Cool

of 750w is 600w available power. Max tdp of the 1050 Ti is 75 ( x 12) = 900w and that isnt even including the motherboard, cpu, ssd, etc. You are going to have to spring for a larger power supply and I would get a modular. All of mine are.

I said I am gonna use 2*750W PSUs i.e. 1500W or 1200W at 80 %

Adding on to that, by using less than the full capacity of the PSUs and splitting the load onto two power supplies, the end result is the PSUs being near the peak of their efficiency curve and save you money on electricity in the long run. Good move on the PSUs.