Procs & PPM — how random effects trigger
Vanilla WoW Classic 1.12 · x5 realm · wowx5.ru
A proc is a random effect that triggers with some chance on a given action, most often a weapon hit. Windfury, a fiery strike off a sword, mana returned by a staff — these are all procs. Understanding how their chance is computed helps you pick weapons wisely in your gear and avoid overrating effects.
A slow weapon with a 'chance on hit' proc is not always better than a fast one: if the proc uses the PPM system, its trigger rate is normalized by speed and the difference is smaller than the raw chance suggests.
What a proc is
A proc is an effect that is not guaranteed but fires with a chance on a trigger. The trigger is usually a melee or ranged hit, less often taking damage, healing or casting. Classic examples: a shaman's Windfury, a 'chance on hit' weapon effect, mana returned by staves.
Important: a proc is only checked on a successful action. If a hit misses or is dodged, an 'on hit' effect does not fire — the attack must land first.
Two ways to compute proc chance
In Vanilla proc chance is computed in two different ways, and this is the key subtlety:
| System | How it works | Depends on weapon speed |
|---|---|---|
| Fixed chance (chance-on-hit) | every hit has the same % to fire | yes: fast weapons proc more often |
| PPM (procs per minute) | chance is tuned to keep a set rate per minute | no: normalized by speed |
This matters when choosing a weapon. A fixed-chance effect is better on a fast weapon (more hits, more procs). A PPM effect gives about the same rate on any weapon, so 'slow for the proc' does not apply.
The PPM system (procs per minute)
PPM (procs per minute) is a way to give an effect a stable rate regardless of weapon speed. The per-hit proc chance is derived by a formula: the slower the weapon (fewer hits), the higher the chance per hit, and vice versa. Over a minute the effect triggers about the set number of times.
Thanks to PPM, legendary effects (like lightning procs on top-tier swords) cannot be exploited by the fastest dagger. This makes weapon choice fairer: you look at DPS and stats, not just 'proc rate'.
Internal cooldown (ICD)
Some procs have an internal cooldown (ICD) — a minimum interval during which the effect cannot fire again even if the condition is met. For example, an effect with a few-second ICD will not proc on every consecutive hit no matter how fast you swing.
ICD limits 'burst' procs and makes effects more predictable. When comparing two items with procs, weigh not only the chance but the presence of an internal cooldown: an ICD-free effect on a fast weapon can total more than a stronger one gated by an ICD.
Procs on the WowX5 x5 server
On WowX5 x5 procs and PPM follow classic rules: the same speed normalization, the same internal cooldown. Understanding the mechanic, you will not overpay for a 'proc weapon' that loses on stats, and you will build the right setup for your class.
Want to test procs for real? Create an account on WowX5 x5, download the game and connect to play.wowx5.ru.
FAQ
What is a proc in WoW Classic?
A proc is a random effect that fires with a chance on an action, most often a weapon hit (for example Windfury or a fiery sword proc). It is only checked on a successful attack: on a miss or dodge an 'on hit' effect does not fire.
What is PPM and how does it differ from chance-on-hit?
PPM (procs per minute) tunes the chance so the effect fires a set number of times per minute regardless of weapon speed. Chance-on-hit is a fixed percent per hit, so that proc fires more often on a fast weapon.
What is a proc's internal cooldown (ICD)?
ICD is a minimum interval during which a proc cannot fire again even if the condition is met. It caps the rate of 'burst' effects and makes them predictable; when comparing items the ICD matters as much as the chance itself.