Case Fans - High CFM

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Profile Vipin Palazhi
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Message 1352423 - Posted: 31 Mar 2013, 11:35:22 UTC
Last modified: 31 Mar 2013, 11:35:54 UTC

I need to get some new case fans for my chassis to replace the existing 6 x 120mm fans. Since I stay in a desert country, the temperatures are slowly rising as summer intensifies and will peak in July reaching 52 degrees in shade. The AC is already running 24/7 and three of my rigs are already running bare bone without any chassis. I was suggested by someone to go for Delta 252 CFM (PFB1212UHE-F00), but at 66dB, I do not want to go deaf. My crunching corner already sounds like a mini wind turbine.

What would you suggest for a low noise/high cfm/cost effective model?
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Message 1352431 - Posted: 31 Mar 2013, 12:04:01 UTC - in response to Message 1352423.  

While not a direct reply. I hope y'all can get to this presentation without accreditation. While it's main concern is computer centre efficiency, one of its messages is that modern computing machinery can operate effectively with input temperatures of 28 C or more without invalidating the warranty. So you needn't overchill your computer room (especially if you can duct the warm air outside the cooled area).
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Message 1352440 - Posted: 31 Mar 2013, 13:08:53 UTC

Use a fan controller with them and turn it down when you arent going full tilt on them... Or you have something like the Scythe Gentle Typhoon 150 CFM at 50dB. Can your case only fit 120mm or can it fit bigger fans?
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Message 1352537 - Posted: 31 Mar 2013, 19:30:47 UTC

I live in a very similar climate. Where during this last summer, the temperature have been between 38 and 45deg C for the last 3 months. (Fortunately autumn has arrived and things are cooler now.) So I have some experience in fighting this battle

I found the bearings in Scythe fans were not up to running 24/7 at 100%. After 6 to 9 months of running they would seize up and I would have to dismantle the fan to oil them. This is the problem with most computer fans, they are just not built for the demands of SETI crunching.

I solved the problem by purchasing some Multicomp model MC21710 120mm 12V 300CFM fans from Element14.com. These are commercial grade equipment fans with long life ceramic bearings. They are expensive but worth the money.

They also sound like a fire siren when running but I found that if you connect them to 5V instead of 12, they run much quieter but still move an awful lot of air. Enough to keep 3 GTX470's at around 60 deg anyway.

Cheaper alternatives are 12 inch mains operated room fans (these do alright for caseless machines) and depending on the humidity at your abode, evaporative air conditioning. This works well where I live as the average summer humidity is only 5 to 10% It's cheaper to buy and run than refrigerated units but you have suck the air into them from outside for best effect.

HTH
T.A.

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Message 1352561 - Posted: 31 Mar 2013, 20:49:37 UTC - in response to Message 1352537.  
Last modified: 31 Mar 2013, 20:54:07 UTC

I found the bearings in Scythe fans were not up to running 24/7 at 100%. After 6 to 9 months of running they would seize up and I would have to dismantle the fan to oil them.

I've only ever had issues with sleeve bearing fans. I've never had a problem with ones that use ball bearings or the newer fluid bearings.


evaporative air conditioning. This works well where I live as the average summer humidity is only 5 to 10% It's cheaper to buy and run than refrigerated units but you have suck the air into them from outside for best effect.

Evaporative airconditiong is great in the areas where it can be used, but you do need to have it setup so it draws air in from outside the house, and it is able to exhaust air outside the house easily. The simplest method is to have the unit in (or right in front of) a window, and leave the door to the room open, and the closest door to the outside (or a window) left open.
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Message 1352564 - Posted: 31 Mar 2013, 20:53:43 UTC - in response to Message 1352423.  

What would you suggest for a low noise/high cfm/cost effective model?

A car radiator fan. Run it from about 9V instead of 12V to keep the noise down.
Grant
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dan
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Message 1352642 - Posted: 1 Apr 2013, 2:38:17 UTC - in response to Message 1352564.  

I use Enermax TB Silence 120 mm fans in my cruncher. The two video card fans (stock cooler) are louder than all five of the case fans combined. Each Enermax fan is rated at 42 cfm and 11 dB. They were the best choice for me when I had the cruncher in the living room.
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Message 1352644 - Posted: 1 Apr 2013, 2:48:31 UTC - in response to Message 1352423.  

I need to get some new case fans for my chassis to replace the existing 6 x 120mm fans. Since I stay in a desert country, the temperatures are slowly rising as summer intensifies and will peak in July reaching 52 degrees in shade. The AC is already running 24/7 and three of my rigs are already running bare bone without any chassis. I was suggested by someone to go for Delta 252 CFM (PFB1212UHE-F00), but at 66dB, I do not want to go deaf. My crunching corner already sounds like a mini wind turbine.

What would you suggest for a low noise/high cfm/cost effective model?

What make and model of case do you have?

Can that case be modified to take much larger size fans?

Larger fans can move much more air while being much quieter at the same time.

Cheers.
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Profile Vipin Palazhi
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Message 1352649 - Posted: 1 Apr 2013, 3:25:09 UTC

With the ambient temperature rising, the room temperature does touch about 25+ sometimes and as I have all my rigs in the same location, the temperature goes up beyond the desirable level.

Humidity is not an issue as I have dehumidifiers in the air supply to keep it within 30-40%. However, venting the hot air to the outside is not as option.

My case is Zalman (the model number escapes me), one of those huge ones that can accommodate six 120mm fans. I have it set up as 3 pull and 3 push (the CPU is liquid cooled and the radiator itself has two in a push pull configuration). The internal temperature probe shows 35 degrees at night, however, wifey sometimes has the habit of turning down the AC while I am not around and the temperature shoots up to 50+ which I dont think is good for the hard drives. Day time is a challenge.

I do not have the time nor patience to mod the case, which is why, except for this machine, all others are running without case mounted on shelves.

As it has been pointed out, most of the other fans have failed on me after a few months of intense use. I do have one fan that runs directly off main line, but unsuitable for use within the case.
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Message 1352651 - Posted: 1 Apr 2013, 3:29:42 UTC - in response to Message 1352423.  

What would you suggest for a low noise/high cfm/cost effective model?


Most consider Noctua fans ugly, but they are top performers and extremely quiet. Standard 120 and 140mmm models operate nearly in total silence, and they come with excellent anti-vibration mounts. Most models also ship with two cabling adapters (LNA and ULNA) that lower noise levels even further at the cost of higher CFM performance. I use a combination of several standard and LNA adapted Noctua fans and the end result is excellent cooling performance and nearly silent operation, even up close.

"History is a pack of lies about events that never happened told by people who weren't there." - Santayana
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Message 1352658 - Posted: 1 Apr 2013, 4:39:53 UTC - in response to Message 1352649.  

With the ambient temperature rising, the room temperature does touch about 25+ sometimes and as I have all my rigs in the same location, the temperature goes up beyond the desirable level.

Humidity is not an issue as I have dehumidifiers in the air supply to keep it within 30-40%. However, venting the hot air to the outside is not as option.

My case is Zalman (the model number escapes me), one of those huge ones that can accommodate six 120mm fans. I have it set up as 3 pull and 3 push (the CPU is liquid cooled and the radiator itself has two in a push pull configuration). The internal temperature probe shows 35 degrees at night, however, wifey sometimes has the habit of turning down the AC while I am not around and the temperature shoots up to 50+ which I dont think is good for the hard drives. Day time is a challenge.

I do not have the time nor patience to mod the case, which is why, except for this machine, all others are running without case mounted on shelves.

As it has been pointed out, most of the other fans have failed on me after a few months of intense use. I do have one fan that runs directly off main line, but unsuitable for use within the case.

Well Delta certainly is a very reliable brand (in over 15yrs I've never had 1 fail on me and I still have them running) but they do make 120-170cfm fans that are 10-20dba quieter (even the 180-210cfm fans are around 8-9dba quieter but I would personally fit a fan controller to those).

Cheers.
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Message 1352671 - Posted: 1 Apr 2013, 6:23:23 UTC - in response to Message 1352658.  

Two recent reviews at Xbit Labs

http://www.xbitlabs.com/articles/coolers/display/120mm-fan-roundup-3.html

http://www.xbitlabs.com/articles/coolers/display/120mm-fan-roundup-4.html

37 fans in total.
"Life is just nature's way of keeping meat fresh." - The Doctor
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Message 1353861 - Posted: 5 Apr 2013, 20:48:07 UTC
Last modified: 5 Apr 2013, 20:56:29 UTC

I havent been able to find any of the good brands in the local market here, and the only one that I came across was coolermaster with 37 cfm. Will have to order it through the net.

Thanks for the sites Keith and all others for your suggestions. I feel Noctua NF-P12 might be a good choice and six of them should do a good job. Zalman ZM-F3-FDB also seems to be a good contender.
______________

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Message 1353881 - Posted: 5 Apr 2013, 22:20:55 UTC - in response to Message 1352423.  

I need to get some new case fans for my chassis to replace the existing 6 x 120mm fans. Since I stay in a desert country, the temperatures are slowly rising as summer intensifies and will peak in July reaching 52 degrees in shade. The AC is already running 24/7 and three of my rigs are already running bare bone without any chassis. I was suggested by someone to go for Delta 252 CFM (PFB1212UHE-F00), but at 66dB, I do not want to go deaf. My crunching corner already sounds like a mini wind turbine.

What would you suggest for a low noise/high cfm/cost effective model?


have you thought of going to LCS corsair has some easy inexpensive ones
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Message 1354166 - Posted: 6 Apr 2013, 19:23:16 UTC - in response to Message 1353881.  

have you thought of going to LCS corsair has some easy inexpensive ones

Vilpin, You don't want inexpensive fans, you want good, reliable, quality fans.

I've been crunching SAH for nearly 10 years across 20 different hardware combinations, and the major problem I've had in this time has been with fans.

CPU, GPU or case fans, if you want something that will stand up to long term 24/7 crunching. You have to go for quality rather than just price. It's cheaper in the long term.

T.A.
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Message 1354171 - Posted: 6 Apr 2013, 20:44:25 UTC - in response to Message 1353881.  

have you thought of going to LCS corsair has some easy inexpensive ones

If they're sleeve bearing they not worth the money, no matter how cheap.
Grant
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Message 1354248 - Posted: 7 Apr 2013, 3:27:19 UTC
Last modified: 7 Apr 2013, 3:29:04 UTC

I use 8 Koolance 108cfm 120x25mm FAN-12025HBK 2600rpm fans, though soon enough that might be reduced to 7 since I'm going to install the 1st of 3 Zotac Infinity Edition GTX580 cards in My PC...
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Message 1379551 - Posted: 10 Jun 2013, 19:43:46 UTC

On the Zotac right now I have a Delta made Dell fan, it's a 120x38mm 190cfm fan that runs at 3900rpm, 4000rpm(210cfm pwm) is My max and I do have a 252cfm Delta, somewhere, but I don't want to go deaf either, so it can stay lost...
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Message 1379767 - Posted: 11 Jun 2013, 8:24:03 UTC
Last modified: 11 Jun 2013, 8:25:03 UTC

My standard high flow fan for a few years now has been the Scythe UltraKaze.

120 x 38MM, 3000rpm, 133cfm, 46db.
Lotsa air, not as noisy as some.

I have one left as a spare NIB. And Newegg or Tiger don't seem to sell them anymore. May have to find another source, if they are still made.

They are great fans, although sleeve bearing.
They run OK for a year or two 24/7, and when they start to squeal, I just have to pop off the little rubber button over the bearing cup, give them a little squirt of HVAC oil, and they are good to go for another year or two...
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Message 1379770 - Posted: 11 Jun 2013, 8:35:56 UTC - in response to Message 1379767.  

, although sleeve bearing.

*shudders*

Grant
Darwin NT
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Message boards : Number crunching : Case Fans - High CFM


 
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