I usually tend to avoid frostytech as their 150w load is quite unrealistic; my 4GHz i7-930 at 1.3v w/ HT enabled (I use SVP, kind of the only reason I use it) far exceeds 150w--stock TDP is 130w at 2.8GHz with 1.25v vcore, 1.35 QPI. I use a Thermalright TRUE Spirit 140 with two fans which still ranks up there with the Archon and Silver arrow on high clocks. Once you start hitting high clocks, the thermals increase two-fold--increased frequency and greatly increased voltage requirements. Higher frequency = lower electrical resistance = higher current = higher wattage/heat generation.

From what I have read and seen from "de-lidded" comparisons, it doesn't matter how amazing the cooler is if it is passive (whether it be air or liquid) since the ceramic TIM acts as a huge bottleneck transferring energy from the CPU die to the IHS to the heat-sink, in that order. At lower clock speeds it is not too much of an issue, but the temps really start to skyrocket around the 4.4GHz+ area--people getting 80c or higher even on top-end closed loop systems. Personally, I would want to shoot for a minimum of 4.5GHz since it seems to be around the sweet spot/plateau for 4770k procs, just like 4.0/4.2GHz is for 920/930 procs.

Unrelated to to your reply, I have noticed the performance issues have gotten a lot worse recently, around the same time they released the "fix" for draw distances related to coils. This could be related to that, or just the increase in server load/population over the last month.