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I'm testing it right now with a few different fans.  I'll see about posting a full article on the site this week.  So far, yes you can improve performance if you are willing to accept more fan noise.


Fans being tested:

Noctua NF-A9x14 (l9i fan)

Noctua NF-A9x14 (retail fan)

Noctua NF-A9 PWM

BGears 90mm Ball Bearing Fan

BGears 92mm Blaster (92x38mm) fan

Yate Loon 92x15mm Fan

Stock fan


I dont have the 120mm adapter, but I do have a different 120mm-92mm adapter which basically forms a duct and can be used.  I might try this just to see how it works.  In my experience so far, the 120mm fans dont add much benefit over 92mm if the fan has overage on the radiator.  I'm curious to see how it will perform with the duct.


I can also test the fan included on the ID-Cooling IS-40, Silverstone AR06 and AR11 if desired.  I'm not sure they will see much improvement over the Noctua however.  Might not hurt to compare all of them on the same cooler just to see which fan is the boss.