Without any enchantment perks, including the 5 Enchanter perks, your skill multiplier with 100 Enchanting is only 1.25 and the generic Fire, Frost and Shock enchantments have a base magnitude of 10 so your enchantment strength would only be 13 points of damage. If you take all 5 Enchanter perks its 25 points of damage and if you take the elemental damage Enchanter perk (Fir, Frost, Storm), it's 31 points. You can get it higher by drinking a Fortify Enchanting poition before you enchant an item. The strongest one found in the game, the Enchanter's Elixir (25%) will further increase the enchantment srregth to 35 points pf damage. If you use Fortify Alchemy gear which caps at 116% total for 4 equipped pieces (unless you use exploits) you can create +32% Fortify Enchanting potions which will raise the enchantment strength to 37 points..