There a bonus cleric spells for high Wisdom, and high Intelligence affects the chance-to-learn and max-level wizard spells.

But is the number of spells-per-day or spells-known for sorcerers affected by any of the abilities? I tried with a couple of different scores for Charisma, Intelligence and Wisdom and didn't notice any difference.

I dont think Intelligence alters the amount of spells a Sorceror can cast. I would guess that Wisdom might affect it, if anything does.

Probably wrong though, lol

No stats affect the number of spells a sorcerer can learn/cast. I believe you can only learn 5 max per level, although you can memorise more if you have equipment which increases the number of spells per level (but this doesn't affect the number of spells available, just the number you can cast without resting).

@ Splunge

What do you mean by the effect of items increasing the number of spells a sorcerer can cast? They don't have to memorize spells, so do rings (and the like) actually let you cast another spell?

For example, take the Amulet of Metaspell Influence, which gives a bonus 2nd level spell. It allows mages to memorize an extra 2nd level spell. Do you mean if you give it to a sorcerer (s)he can now cast 7 2nd spells before resting rather than 6?

I think I just got thrown off by the memorize part...

@Aldeth
That's correct. A sorcerer with rings of wizardry/acuity, metaspell amulet, and the Nethril circlet (I think that's the one) gets a ton of extra castings per day, but is still limited to their choice of five spells per level.