SLI is dead, and when it was a thing it works not really good.
Anyway the GPUs are cheap atm, and i want give it another try.
My plan is building a system that still running WinVista 32bit for Gaming. Yes Vista! Why? Because DX10 and also able to run old XP stuff.
I still running a system with vista 32bit SP2. And im really happy with it, anything works perfect for me.
I dont want a 64bit OS for some reasons of compatibility (software/hardware).

It should also in the timeline 2010-2012.

As CPU i choose a i7-990X that gives me the full 32 Lanes for the SLI.
And for the GPUs it will be two GTX Titan Black .
I was looking for some canidates and atm it goes to the Evga SLI classified/3.
But im not really happy about the pcie slot positions.

So i need some recommandations for a board with SLI chipset, and best 3slot between the both pcie slots that hold the two GPUs.