Wow, just found this pair of Cesti, and wow...

The Set of Cesti of Super Speed (+4,+16) [5,+18] (+3 to stealth)
{SlSr;AcFiDkNtCaDi}

+16 Damage, stealth, acid, fire, dark, Nether, Chaos, and disenchantment. Activates for Acid Bolt. The nicest i have ever seen. I just found them on my Spectral Wyrm in Poschengband, so i can't wear them, no hands :)

+16 Dam, very nice! Er...do they actually give you any speed?

Nope, no speed. It seems randarts with speed or stealth in the name don't actually have those a lot of the time.

Ring of Power
 

the Ring of Power of Anargoth (+4, +4) <+14>

+14 Intelligence, speed.
Provides resistance to poison.

When aimed, it drains up to 120 hit points from a target creature.

I'm smert!!

Only if you were dumb to begin with. No outsmerting in Angband!

WOW!
How does the generator come up with that? I thought it kept the rings of power as is? But I've probably got that wrong, as usual!:confused:

Clearly not V. Some variants like ToME can generate stupidly OP randarts like rings <+15> to speed AND attack speed.

Its Vanilla all right, only the One Ring remains unchanged with randarts on.
Now 14 attacks would indeed be over the top, but 14 Int certainly isnt.
Theres the small issue of stat caps, and unless you play a Htroll mage and find a ring of power before your int is maxed, chances are that impressive looking amount of int is just going to waste.

It is V. 3.5. RandArts. I'm happy to post whatever to prove it if need be.

At first, I thought this had to be broken; but, then again, its not as broken as it seems. First, I already had 18/*** INT, as a mage, with other EQ bonuses. Adding 14 more does nothing, really. Second, the +14 speed is not entirely uncommon---I regularly find +11~12 speed rings. Haven't found anything above that yet, but +14 for a Ring of Power is not all that exceptional.

Other than the RPoison attribute, there really isn't a whole lot to this ring of power, other than the abnormally high +14 value. If I came across a +16 or better speed ring, I might be tempted to swap. I would have rather had an Immunity or a broader spectrum of attributes than the two listed.

:)

Yeah, this is functionally a Ring of Speed plus a Ring of Resist Poison plus a Ring of Intelligence (plus some minor damage bonuses). It's nice, but not remotely broken. If you had these abilities on a different slot (even on the boots) then it'd be a different story.