Someone found this quiver with surprisingly high values, although I'm unable to find a level 30 rare quiver on d3db.com
Given that the item's internal level (IIL) determines which affixes are possible, I'd like to know whether the IIL affects the minimum/maximum rolls for an attribute, a graph or table would be great.
For example, let's say items are able to get a pure +intellect affix from IIL 20, what's stopping you from rolling 250 at 20?
Is it a bell curve, which has shallower gradients with a higher IIL of the item?
Is it capped, dependant on IIL?
Do the min/max caps step up at certain IILs,though it's the same attribute? For example, IIL 20-40 is capable of 5-120, IIL 41-60 is capable of 20-320, …, IIL 63 = 40-400
Best Answer
The requirement level is defined by the item and every item has an internal level number.
Affix Level Minimum
In Diablo 3 every item has an internal level number, and every affix has an "affix level minimum". If an item's internal level number is below an affix's level minimum, the affix cannot be applied to the item. This prevents the incongruity of attaching extremely powerful affixes to crude, lowly items.
Source: Diablo 3 Signature Series Guide
There is no list with items and their internal level numbers so I guess they are assigned randomly for every item.
But at least legendary items also have a total affix count and bonus affixes. Here is an example:
Blackguard: LVL REQ: 48; TOTOAL AFFIX COUNT 6; BONUS AFFIXES: 2; GUARANTEED AFFIXES: Damage Bunus, Min/Max Damage, Strength/Dexterity, Crowd Control, Reduction