Which parts of Inferno Act 1 actually drop ilvl 63 items?

When I start from the beginning, I don't seem to ever get any - am I just getting unlucky? Does their drop rate change from the beginning of the act to the end?

Solution 1:

Per Blizzard:

The chances of getting an item of each item level are even throughout an entire Act. The hotfix note provides "approximate" rates because there are minor variances based on item type, and the % listed is an approximate aggregate across all item types (for the item level in a specific Act).

In an effort to make the answer more general, I'll include the updated drop rates for all zones. From the patch notes posted here, the approximate drop rates for all zones are:

Hell - Act III and Act IV

• iLvl 61: 9%
• iLvl 62: 1.9%
• iLvl 63: 0%

Inferno - Act I

• iLvl 61: 17.7%
• iLvl 62: 7.9%
• iLvl 63: 2.0% (This answers your specific question)

Inferno - Act II

• iLvl 61: 18.6%
• iLvl 62: 12.4%
• iLvl 63: 4.1%

Inferno - Act III and Act IV

• iLvl 61: 24.1%
• iLvl 62: 16.1%
• iLvl 63: 8.0%

Given a 2% drop rate for Act I, you are probably just unlucky - or rather, you'd be very lucky if you got one.

Solution 2:

I have found 2 Ilevel 63 items in Act 1 Inferno.

1 in The Weeping Hollow and 1 in in a Defiled Crypt under the Cemetery of the forsaken

Both found during Skeleton King runs

and ofc not during the same run I did many runs before they dropped

Solution 3:

The entirety of Act 1 Inferno has a 2% chance of dropping items with an ilvl of 63. In fact, the drop rate of items with ilvls of 61, 62, and 63 are constant through the whole of each act.

See the patch notes for more information.