Even with an overclocked processor, the Gladiator is second to none! Temperatures were consistently 2-4C cooler with this HSF, and with the same Delta fan that I've used on a number of other sinks, the noise level wasn't any louder. Even when I decided to really be unfair to this sink, it took everything that I could dish out.
Unfair you ask? I ran the same processor at 1300MHz to see how it would do, then ran the Quake III Deathmatch test again. The result was a very tolerable 39.5C! This is a cooler temperature than the highly touted WBK-38 heatsink was able to get at 200MHz slower clock speeds. Very impressive indeed.