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h100i with 140mm fans that mount as 120mm?

post #1 of 3
Thread Starter 
Hey, I read that you can use 140mm fans with radiators that normally use 120mm fans as long as they have 120mm mounting holes. I was planning on buying 120mm noctuas, but wondered what the benefits are of using 140mm fans with the h100i, or if there are actually negative effects. Can anyone help me out here?
post #2 of 3
I'm not sure about any benefits/negatives of 140mm on the H100i specifically, but I do know about the negatives of 140mm fans on radiators.

140mm fans generally move a lot more air with a lot less noise than the 120mm fans. However, 120mm generally have far more pressure, which is good for radiators and heatsinks.
Noctua makes two fans that would work well with the H100i. The NF-A15 and the NF-F12. These two fans both use 120mm but the NF-A15 is a 140mmx150mm fan whereas the NF-F12 is a "standard" 120mm. The increased surface area of the NF-A15 will have more air contact with exposed fins, i.e., as long as there are fins that are normally covered by the fan housing, these fins will have air on them with the larger fan. The NF-F12 on the other hand has far more pressure and thus will be better at pushing air though the fan, which means that the fins that are receiving air are getting more air pushed across. Personally, I would prefer more pressure to push air through than more surface area as the increased pressure reduces the effect of the resistance of the fins.

That said, I just looked up a picture of the H100i and I don't think two 140mm fans will sit next to each other on that radiator. Just because the mounting for a fan is 120mm spacing doesn't mean that the fan is a narrow as a 120mm fan.
post #3 of 3
I have rarely seen a 140mm fan that compares to the 120mm equivalent. I would stick with 120mm Noctuas or 120mm Scythe Gentle Typhoons.
Folder Rodriguez
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CPUMotherboardGraphicsRAM
i7 3770k MAXIMUS V FORMULA EVGA 680 FTW+ 4GB  16GB (2x8GB) G.SKILL Trident X 2400mHz CL10 1.65V 
Hard DriveHard DriveOptical DriveCooling
Corsair Force 3 120GB SSD Seagate SV35.5 2TB 64MB cache 7200 RPM HDD LG blu-ray R/W Heatkiller CU 3.0 Nickel/Black 115X 
CoolingCoolingCoolingOS
Swiftech MCP355 w/ Petra's Mod Top Undecided radiator config 12mm OD push fittings, and E22 12mm acrylic tubing Slackware 64-bit 
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Arch Linux 64-bit Asus 24" 1920x1080 LED Rosewill 9000 w/ MX Blues Seasonic X650 
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Scratch build test bench Logitech G600 black Xtrac Ripper XXL 2x Corsair AF 140mm quiet edition case fans 
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Promilatech PK-1 
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**Possibly used** HifiMan HE-500 headphones **USED** Schiit Lyr headphone amp Jolida Glass FX Tube DAC EK Nickel CSQ 680+ Waterblock 
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2x Aplhacool NexXxos UT60 360mm full copper rad... 6x Scythe Gentle Typhoon 1450 RPM fans 10 meters of 12mm OD nickel plated copper pipe,... 
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Folder Rodriguez
(21 items)
 
   
CPUMotherboardGraphicsRAM
i7 3770k MAXIMUS V FORMULA EVGA 680 FTW+ 4GB  16GB (2x8GB) G.SKILL Trident X 2400mHz CL10 1.65V 
Hard DriveHard DriveOptical DriveCooling
Corsair Force 3 120GB SSD Seagate SV35.5 2TB 64MB cache 7200 RPM HDD LG blu-ray R/W Heatkiller CU 3.0 Nickel/Black 115X 
CoolingCoolingCoolingOS
Swiftech MCP355 w/ Petra's Mod Top Undecided radiator config 12mm OD push fittings, and E22 12mm acrylic tubing Slackware 64-bit 
OSMonitorKeyboardPower
Arch Linux 64-bit Asus 24" 1920x1080 LED Rosewill 9000 w/ MX Blues Seasonic X650 
CaseMouseMouse PadOther
Scratch build test bench Logitech G600 black Xtrac Ripper XXL 2x Corsair AF 140mm quiet edition case fans 
Other
Promilatech PK-1 
AudioAudioAudioOther
**Possibly used** HifiMan HE-500 headphones **USED** Schiit Lyr headphone amp Jolida Glass FX Tube DAC EK Nickel CSQ 680+ Waterblock 
OtherOtherOther
2x Aplhacool NexXxos UT60 360mm full copper rad... 6x Scythe Gentle Typhoon 1450 RPM fans 10 meters of 12mm OD nickel plated copper pipe,... 
CPUMotherboardAudioAudio
4770k Asus Maximus VI Impact Audeze LCD-2 Woo Audio WA3  
Audio
Jolida Tube FX DAC 
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