I spent some time reading reviews and realized that most reviews tend to compare the coolers at Low, Medium or High fan speeds. The reviewers then proceed to simply list out the dB and temperatures in a chart. However, that tells us little about how
comfortable those fan settings are (unless you can easily tell the difference between 40 vs. 42 vs. 48 dB, etc.).
Finally, I found this video review which limited the top air coolers to
only 40 dB using a fan controller:
http://www.youtube.com/watch?v=YLJxEWPrEDs
Fast forward to 9min:30sec to see that 40 dB at 15 cms is pretty quiet. This drops to only 31.5 dB 1 meter away.
The testing involved a
Core i7 920 @ 4.3ghz with 1.42V:
All of the coolers were equipped with 2x140mm fans, limited to 40 dB using a fan controller, MX-3 thermal paste was used for consistency:
Thermalright Silver Arrow = 84*C
Noctua NH-D14 = 92*C
Prolimatech Megahalems Super Mega = 95*C
Thermolab BARAM 2010 = 97*C
Another great cooler they didn't test though was the Thermalright Archon with 2 x TY-140mm fans.
As you can see, the Noctua NH-D14 which performed extremely well in most reviews such as Vortez is actually
louder than the Silver Arrow. So once its fan speeds are dropped to about 950-1000 rpms (40 dB), it is no longer able to maintain its leadership positioning.
I myself just grabbed the Silver Arrow at Mwave.com for
$70. Just call them and ask for free shipping (since they were offering it last week and say that you missed it by a couple of days). I don't doubt that the H100 is the more powerful cooler (esp. in a push/pull config). However, at $120, it's $50 more expensive, and it appears that it achieves the best performance at much higher noise levels based on that HardOCP review.
As an added bonus, SA ships with Thermalright Chill Factor III, which is one of the
better thermal pastes.
If you are ok with the added noise levels, a 3x120mm radiator water cooling system
will be about 10*C better than the top air coolers. However, things change completely once you start comparing them at similar noise levels:
"If we compare our today’s hero, Swiftech H2O-X20 Edge, against the today’s best air cooler [Thermalright Archon], we have to keep in mind the acoustic performance of both these systems and we are going to get to it in the next chapter of our article. However, even now it already becomes obvious that in its quietest mode with all fans at 950 RPM and the pump at 2150 RPM Swiftech H2O-X20 Edge is only 2°C better than Thermalright Archon with its default fan TY-140 at 1260 RPM." -
Xbitlabs
The H2O-X20 costs $320! You can add another fan to the Archon and you'll have a very quiet air cooler within a hair of that water cooling system for 3x less cost.