Leveled up my Enchanting to 80 and my Smithing to 100. Enchanted 4 pieces of equipments with ''Fortify Smithing''. An armor, gloves, a necklace and a ring. They all have +18% to Smithing, so stacking them up boosts it to +72% efficiency. I equipped a full set of Daedric armor without any improvement, it was at 370. After that, I improved the pieces with my Fortify Smithing equipment and I got the full set to have an armor rating of 590. WTF honestly? Then I thought to myself, maybe I should improve Alchemy that way I could just brew a Fortify Enchanting potion, which would boost my +18% Fortify Smithing to something like +30% Smithing maybe, then apply it to a full set of Daedric armor and get a max armor rating of 1000 or something. Is there even a limit to armor rating? Cause there should be.