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Slow 120mm vs fast 40mm fans

MojangYang
By MojangYang
in Cooling
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I’m just wondering: out of a 1800 rpm 120mm fan and a 6000 rpm 40mm fan, which can intake more air more quickly?

the 40mm one if about 2 cm thick and the 120mm one is about 1.5cm thick

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3 minutes ago, Supportsneedlove said:

I'd say to get the slower bigger fan. It will make less noise.

I forgot to mention that the small one is maglev and make little noise

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I forgot to mention that the small one is maglev and make little noise

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4 minutes ago, seoz said:

Slower but bigger, it means less overall noise whilst still covering more area to create airflow.

I don’t care about the noise. The small one is silent anyway because of the maglev bearing

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1 minute ago, MojangYang said:

I don’t care about the noise. The small one is silent anyway because of the maglev bearing

Regardless, 120mm can still cover much more area than a puny 40mm one.

mechanical keyboard switches aficionado & hi-fi audio enthusiast

switch reviews • how i lube mx-style keyboard switches

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2 hours ago, Zipfirealpha said:

fans have a CFM rating this will yell you what fan moves more air

 

This....then this again....then one more time.  Pick the fan with the highest rated CFM at max RPM, with an acceptable DB level you like.

 

I only have an 80mm intake on my PC because it is apart of my 2 slot Evercool HDD accessory for 5.25 bays.  My actual intake is a 2 200mm fans but the little guy puts some cool air high up in the dead air zone in the bays!

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My Rig: ASRock B450m Pro4, Ryzen 5 3600, ARESGAME River 5 CPU cooler, EVGA RTX 2060 KO, 16gb (2x8) 3600mhz TeamGroup T-Force RAM, ARESGAME AGV750w PSU, 1tb WD Black SN750 NVMe Win 10 boot drive, 3tb Hitachi 7200 RPM HDD, Fractal Design Focus G Mini custom painted.  

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Daughter 1 Rig: ASrock B450 Pro4, Ryzen 7 1700 @ 4.2ghz all core 1.4vCore, AMD R9 Fury X w/ Swiftech KOMODO waterblock, Custom Loop 2x240mm + 1x120mm radiators in push/pull 16gb (2x8) Patriot Viper CL14 2666mhz RAM, Corsair HX850 PSU, 250gb Samsun 960 EVO NVMe Win 10 boot drive, 500gb Samsung 840 EVO SSD, 512GB TeamGroup MP30 M.2 SATA III SSD, SuperTalent 512gb SATA III SSD, CoolerMaster HAF XM Case. 

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Daughter 2 Rig: ASUS B350-PRIME ATX, Ryzen 7 1700, Sapphire Nitro+ R9 Fury Tri-X, 16gb (2x8) 3200mhz V-Color Skywalker, ANTEC Earthwatts 750w PSU, MasterLiquid Lite 120 AIO cooler in Push/Pull config as rear exhaust, 250gb Samsung 850 Evo SSD, Patriot Burst 240gb SSD, Cougar MX330-X Case

 

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14 hours ago, Zipfirealpha said:

fans have a CFM rating this will yell you what fan moves more air

The small one has a cfm of 7.7. It that good?

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