Exactly what power did the Ring of Fire give to Gandalf?

[The Might]

I guess it just was supposed to somehow enhance his already existing powers, and help him achieve his aim.

"Warm and eager was his spirit (and it was enhanced by the ring Narya), for he was the enemy of Sauron, opposing the fire that devours and wastes with the fire that kindles, and succours in wanhope and distress; but his joy, and his swift wrath, were veiled in garments grey as ash, so that only those that knew him well glimpsed the flame that was within. " ~ Unfinished Tales, The Istari

Guess Legate pretty much summed up all I was going to add.