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140cm High Static Pressure Blue LED fans

post #1 of 9
Thread Starter 
Hey mates,

I've been lurking around for a while now and OCN has been a great reference tool. Now I need your help.

I'm currently building a system and need four 140cm fans. They need to have a relatively high static pressure and have blue LED's. But this seems to be impossible to find.
When I find one with good static pressure it doesn't have LED's (e.g. Akasa Viper or Apache); if they have LED's, the static pressure is always crappy (e.g. Aerocool Shark); if LED's are present and it has a good static pressure... they are 12cm fans (e.g. Cooler Master Sickleflow).

The best ones I've found are the Bitfenix Spectre Pro LED, but 1.38 mmH2O is not that great, really.

And yeah, blue LED's are really important here. rolleyes.gif

So, should I just buy them or is there a better alternative? (preferably that doesn't cost an arm and a leg)

Thanks.
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post #2 of 9
Are they for your case or for a rad / heatsink ?

$10+shipping (http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=36_316_850&products_id=35067 , http://www.frozencpu.com/products/16100/fan-1004/Phobya_140mm_x_25mm_G-Silent_14_Blue_LED_-_1100_RPM_79117.html) Phobya G-Silent 14 going by
http://www.hardware.fr/articles/886-26/recapitulatif-db-a-vs-cfm.html


GSilent 14 video http://www.youtube.com/watch?v=GCNiTC2zm0I

1.4 mm H2O is fairly standard Manufacturer spec for 140mm , you shouldn't go by what anyone selling you a fan says wink.gif
Manufacturers will claim 70+CFM at <1200RPM (lookin' at you, NZXT FZ-140 LED , Bitfenix Spectre Pro mad.gif) biggrin.gif

I'm looking for more reviewed LED 140mm fans. Is UV reactive fine (Gelid Wing 14, Silverstone Air Penetrator for example)? 140mm fans are a smaller market than 120mm fans , to narrow down to Blue LED is really limiting.
More money (Click to show)
Cougar Dual-X probably (still pricey though at $20) http://www.newegg.com/Product/Product.aspx?Item=N82E16835553015

Aerocool Shark (~$18) http://www.newegg.com/Product/Product.aspx?Item=N82E1683512905
" I've not personally had my go at them. From other tests I've seen, they're a lot of flash with just decent performance."
http://www.overclock.net/t/1321074/tator-tots-big-quiet-120mm-140mm-fan-round-up/950#post_193708468

Caveat: sometimes the LED version of the same fan model has a different bearing. Corsair AF140 Blue LED uses sleeve , AF140 regular uses Hydro. Tater Tot will tell you some manufacturers claim to have a hydrodynamic bearing but use a sleeve/rifle bearing.
Edited by AlphaC - 11/5/13 at 7:25am
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post #3 of 9
Thread Starter 
The fans are for the case, but since they'll have to blow through filters and a couple of plastic/metal meshes, I'd like to use something with a reasonable static pressure value.

Yeah, I know that I should take it with a grain of salt. I've heard that Bitfenix blatantly lies about technicalities in pressure tests. That said, probably every manufacturer fabricates their tests in some way or another.

Now, you say that "1.4 mm H2O is fairly standard Manufacturer spec for 140mm", but that's certainly not true when LED's are involved.
Unfortunately, I need active light, so UV reactive won't cut it. The Phobya G-Silent 14 look great, however I can't find its static pressure values anywhere.

I've had some Aerocool Shark and they really aren't worth the money. The airflow is ridiculously weak (at least for that price range).

Thanks a lot for your help.
Edited by Ryuknar - 11/5/13 at 3:36pm
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post #4 of 9
You know static pressure is an intercept just like "CFM" is an intercept on the P-Q graph right?

Like this one:

or this Cougar one which is deceiving


or this one from martinsliquidlab

http://martinsliquidlab.org/2013/02/18/why-static-pressure-max-flow-specs-are-poor-measures-of-fan-performance/
Edited by AlphaC - 11/5/13 at 4:30pm
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by AlphaC View Post

You know static pressure is an intercept just like "CFM" is an intercept on the P-Q graph right?

Yeah, that is why I'm saying I need a good pressure, since in this case, the airflow will be a bit restricted. Am I not right?
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post #6 of 9
You're right, but you're going about it wrong by going by manufacturer spec.

The Hardware.fr review I linked tested the 140mm fans on Hardware Labs SR1 140mm (9 fin per inch radiator , 56mm thick) which is a severe flow restriction.

The airflow drop is close to 30% on that test condition, depending on if the fan has good pressure.

You lose more flow with the Phobya G-Silent 14 than with a Phanteks / Thermalright but the radiator results are good enough for a LED fan.

You can compare yourself at http://www.hardware.fr/marc/ventilo3/graph.htm?140rad
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post #7 of 9
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Oh, sorry, just saw there was a graphic in your first hardware.fr link. I'm using NoScript on my browser and it was not loading.

But those are not PQ curves, it's noise values on the ordinates. How is that related to what I'm looking for?
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post #8 of 9
It's a fixed flow "obstruction" /restriction (radiator) , so that's essentially a fixed "high" pressure. The CFM for that "high pressure" would give you a better idea of the realworld flow numbers instead of trusting the manufacturer spec smile.gif

It is doubtful someone will be making P-Q graphs for every fan for multiple RPMs. Usually it's dB/CFM or airflow/rpm for a given flow situation , or delta °C/dB. The end-user doesn't care about the exact pressure number and pressure isn't as easy to measure because pressure varies at every point. Static pressure = stagnation pressure = nonmoving air & it varies for each voltage (RPM).

By having a free flow number and a radiator restricted flow number you can get an idea of how much CFM you lose when it's restricted by a filter or obstruction like bezels / hard drive cage.

If you look through the article some fans lose ~30% on a rad , some like the Phanteks and Thermalright lose much less (which makes sense since the companies use those fans on their dual tower heatsinks).

Martinsliquidlab also tested 140mm fans for restricted flow on a HWlabs SR1 , which is the same rad. http://martinsliquidlab.org/2010/12/10/r7-140mm-fan-testing-on-a-hwlabs-sr1-radiator/

Martin also made PQ graphs a while back in 2009 :
Quote:
1) Pressure Vs. Flow rate test – In this test I plot out the full curve, usually at a fixed 12.00V +-.03V. I first start with the chamber flowing freely. I zero out my guage at startup of each test. Then start recording, first at maximum flow (no restriction) and read RPM from my crystalfontz. Then I slowly start adding restriction by placing a box at the outlet and strive for reducing flow rate by about 5CFM increments. I then make another recording of CFM, Pressure, and RPM. I continue this until I begin having CFM read errors. This occurs when the CFM starts to climb as I increase restriction and it due to my flow chamber being too small, but thankfully it’s generally off the curve enough that it’s data that’s not as important. I skip over this area, stop flow completely and get the last reading which is completely blocking the air flow and measuring static pressure. This is the scientific big picture test.
http://martinsliquidlab.org/2009/03/26/r1-fan-testing-pq/

edit: see also

http://catalog.nidec-servo.com/digital/english/general/pdf/g_fab_technical.pdf

& what you're looking at for Hardware.fr is RPM and CFM as well as dB , for a given flow restriction

edit 2: from http://www.aquatuning.de/product_info.php/language/en/info/p13424_Phobya-G-Silent-14-1100rpm-Blue-LED---140x140x25mm--.html

other reviews
http://www.coolingtechnique.com/recensioni/74-ventole-rheobus/831-phobya-g-silent-1214-nano-2g-12-pwm-e-nano-g-14-.html?start=9
http://www.xtremehardware.it/cooling/air/phobya-g-silent-14-1100rpm-red-led-201108165596/
http://www.technic3d.com/review/kuehlungen/1281-phobya-g-silent-und-nano-g-luefter/1.htm
http://www.dexgo.com/index.php?site=artikel/view.php&rubrik=Hardware&id=607
Edited by AlphaC - 11/8/13 at 12:49pm
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post #9 of 9
Thread Starter 
As a conclusion, for those who might be interested, thanks to the detailed info on this thread, I ordered (and received today) 7 Phobya G-Silent 14 Blue LED instead of the Bitfenix Spectre Pro LED that I was gonna buy originally.

And I was not disappointed. They have a good centered airflow even when blocked. Not the prettiest fans, however they have a very nice blue LED and that's what I was looking for.

I'll also link this very good (slightly outdated) roundup: http://www.tomshardware.co.uk/forum/331629-28-cooling-roundup-2012

For anyone reading this and still looking for the same thing, there's also the Bitfenix Spectre PWM LED. Its specs seem good, but there is not a single professional review that I can find about it.

AlphaC, thanks a lot for your help, mate. thumb.gif
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Samsung 840 Series 250GB Western Digital Red 32TB (4TB x8) LG GH24NS90 M-Disc DVD Rewriter Zalman CNPS9900 MAX 
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Bitfenix Spectre LED 14CM Blue (x6) Microsoft Windows 7 Ultimate (x64) AOC I2757FM 27" AH-IPS (x3) WASD Keyboards Cherry MX Blue 
PowerCaseMouseMouse Pad
Fractal Design Newton R3 1000W Corsair Obsidian 750D Full Tower Logitech G502 Proteus Core Razer Goliathus Control Edition 
AudioAudioOtherOther
Creative Sound Blaster X-Fi Titanium Razer Tiamat 7.1 Scythe Kaze Master II Akasa AK-ICR-09 Flash Card Reader 
Other
Sharkoon CCFL White 30CM (x4) 
CPUMotherboardGraphicsRAM
Intel Core i5-3570K Asus P8Z77-M Pro Sapphire Dual-X R9 270X 2GB OC G.Skill RipjawsX 8GB 
Hard DriveCoolingCoolingCooling
Western Digital Black 1TB Intel Stock Cooler Arctic Cooling F9 Arctic Cooling F12 (x2) 
OSMonitorKeyboardPower
Microsoft Windows 7 Ultimate (x64) Yamakasi DS270 27" AH-IPS Logitech K290 XFX Pro 750W Core Edition 
CaseMouseMouse PadAudio
Fractal Design Core 1000 Sharkoon Drakonia Black Sharkoon 1337 Logitech G430 Surround 
CPUGraphicsRAMCooling
AMD A4-4000 3.0GHz Sapphire Radeon R7 260X 1GB Kingston ValueRAM 4GB AMD Stock Cooler 
OSMonitor
Microsoft Windows 7 Enterprise (x64) BenQ W1070+ Projector 
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