LarsMarkelson

Read these, they have lots of good fan recs:

Air cooling guide

Guide to fans

Off the top of my head, #1 best is Sanyo Denki San Ace 120x38mm H101 fan, others that are good are Yate Loons, Zalman ZM-F3, Sharkoon 2000, GentleTyphoon AP-15...

Oupavoc

nice work, really thorough. great tests

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Tommie

IMPRESSIVE!
Job well done!
Maybe you could mention the fact that the IFX-14 has its downsides ( big and base usually bretty bad) but other than that it was perfect!

killa_concept

You generally want similar RPM fans when doing push/pull, but if those two are what you have available, put the lower CFM (yate) one as push... having higher speed air pushing into lower speed can damage the motor whereas lower speed pushing into higher speed just causes a wind-tunnel effect

You generally want to stick with 120x38s for their high static pressure when using them on heatsinks or radiators. San Ace 101s are the best you can get, but Panaflos (also sold under the brandname Rexus) are cheaper but still awesome. Some might recommend Scythe UltraKaze, but I advise against them as they're sleevebearing (not as durable as ball-bearing) and also put out a horrendous clicking noise when undervolted.

I definitely have to say that the Megahalem is much easier to install and has a very solid retention method... this was probably the deciding factor for me as to which to keep

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