Also.......do not believe the Wiki guff in the link about armour cap..... The cap is an arbitrary value beyond which Damage reduction is noticeably reduced compared to the rise in AR. The fact is....more armour rating still gives more protection....albeit at a diminishing rate.
This fact is not made clear in the Wiki article and leaves the reader to believe there is no benefit in smithing beyond the cap. Scurrilous lies!
But don't believe me......smith up some really high armour like dragonscale over AR 1000 then find a strong npc to deal you some damage and do the experiment...... I did.
The compete credit for putting me straight on this belongs to Sah (Vulon). If I had not listened to her, I would still be leaving my AR around 650 believing it to have maxed out for damage reduction.
Thank you Sah