I initially operated the board with the memory. However, it only ran at 1866Mhz despite the latest bios. I would recommend G.Skill Trident, Cruicial Ballistix or Corsair Vengeance. I now have the latter in the RGB edition.

Which RAM bars do you recommend for the board? so that they run at 3200Mhz?

So with me, the Corsair Vengeance also only runs at 1866Mhz. can someone tell me why?

Yes, that should fit.