Update to share:
today, finally, new machine is online: setup 5820k-32GB RAM-singleGPU970gtx.

amazing! launched 7 clients to low res in single screen, cpu 15/20% load, 6/7 GB ram load, new ssd samsung rocks!

unlucky with mboard: forced to sub it with amazon, here needed 10 days.
new one arrived today. and this one works.
after that, gone crazy with ram too. i have 8x4GB modules. bought 4 + 4, same model same brand but i ve got issues when i tryed to install them "randomnly".
quad channel needs all the same part number too ... at least with my mboard and BIOS.

again... thx!