Generally my concept on ambient is if it happens on the earths surface where people live in towns of 20-30000 people then no problem, then again I kicked up a league to avoid the argument. If you compare the top 10 spots in the leagues the line between Enthusiast & Apprentice (Hate This Name) is a little fuzzy, which fits with my first statement if comparing cooling only. Then again if you compare all user's league placement overlap is huge, which points more to effort and using the system to your advantage than to what cooling is used. Last the dirty word money comes into play and or the ability to have friend/client's hardware for abuse. As for setting an ambient limit in the category benching I see no point, competitions set it and if the result is out of normal range make them prove it.