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Disappointed by Cooler Master "90 CFM" 120mm fans = Now seeking loud under load, silent at 50% - Page 3

post #21 of 28
Quote:
Originally Posted by fleetfeather View Post


Ahh bummer! If you want, you can see if you can find some Swiftech Helix fans; they're pretty much rebrands of the Scythe GT AP-15's, but with a better bearing according to Xtremesystems.org:
Source: http://www.xtremesystems.org/forums/showthread.php?278420-Swiftech-s-new-products-for-2012&p=5033913&viewfull=1#post5033913
Haha, it's not a personal attack on you tongue.gif

CM grossly exaggerate the specs of their fans (especially the Sickleflow's), which makes it tough to determine what you're actually paying money for. I think this is something the OP has realised too with his current CM fans.

Anyways, you're suggestion just caught me off-guard I guess haha

 

Maybe I still have a lot to learn, but what I've gathered so far is that their ratings are figured out like this:

 

CFM: at the highest speed

 

Air pressure: at the highest speed

 

dBa rating: at the lowest speed, but sometimes at the highest speed too

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post #22 of 28
Quote:
Originally Posted by TwoCables View Post

Maybe I still have a lot to learn, but what I've gathered so far is that their ratings are figured out like this:

CFM: at the highest speed

Air pressure: at the highest speed

dBa rating: at the lowest speed, but sometimes at the highest speed too

As far as I know, you're spot on as far as the methodology for ratings/specs go.

Unfortunately, a few people on various forums who have benchmarked various fans to determine what their 'real-world performance' is have brought up the general over-spec'ing listed on many CM fans (CM is not alone in this, but they're one of the worst offenders)

I'm not sure how it happens (and whether it's deliberate or genuine error), but there's been fairly sizable differences reported in rated performance vs real performance for CM fans in particular. I recall one Fan Roundup from Tom's Hardware which suggested the Sickleflows actually produce around 70% of the CFM that they're rated for @ 100% speed, with double the noise (dB). =S

From memory, Noctua, Silverstone and Scythe were some of the more accurate brands in terms of Boxed Specs vs RW Specs. I'd have to go search for the different Fan Round-ups again though to confirm for sure...
    
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post #23 of 28
Quote:
Originally Posted by fleetfeather View Post


As far as I know, you're spot on as far as the methodology for ratings/specs go.

Unfortunately, a few people on various forums who have benchmarked various fans to determine what their 'real-world performance' is have brought up the general over-spec'ing listed on many CM fans (CM is not alone in this, but they're one of the worst offenders)

I'm not sure how it happens (and whether it's deliberate or genuine error), but there's been fairly sizable differences reported in rated performance vs real performance for CM fans in particular. I recall one Fan Roundup from Tom's Hardware which suggested the Sickleflows actually produce around 70% of the CFM that they're rated for @ 100% speed, with double the noise (dB). =S

From memory, Noctua, Silverstone and Scythe were some of the more accurate brands in terms of Boxed Specs vs RW Specs. I'd have to go search for the different Fan Round-ups again though to confirm for sure...

 

It could be the way that they test them too, including the testing equipment that they're using. I would imagine that they're testing them in unrealistic conditions, such as the fan just sitting out in the open blowing into the sensors. Yeah, it's going to have much better results sitting out in the open than being on a side panel where the metal is meshed out or blowing through a heatsink.

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post #24 of 28
Quote:
Originally Posted by TwoCables View Post

It could be the way that they test them too, including the testing equipment that they're using. I would imagine that they're testing them in unrealistic conditions, such as the fan just sitting out in the open blowing into the sensors. Yeah, it's going to have much better results sitting out in the open than being on a side panel where the metal is meshed out or blowing through a heatsink.

Very true, there's many factors in play with these benchmarks, and methodology is going to play a huuuuge part
    
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post #25 of 28
Quote:
Originally Posted by fleetfeather View Post

My suggestion: Scythe Gentle Typhoon AP-15's

I run 5 of them off a fan controller; 2 are on my H100i, the other 3 are intakes or exhaust.

IMO, they're quiet at 1200rpm and more than tolerable at 1900rpm, and they seem to perform well in any usage scenario (heatsinks, behind dust filters / front plates, straight-up case fans).

 

Or AP-31's.

 

For me anyway, at full load the fan noise is bearable but you may need to add dampening to kill any vibrations through the case that can make an annoying hum.

I run mine at the lowest rpm/voltage they'll turn at on a Lamptron C2, which to my ear is near silent and gets good performance.

 

Quote:
Originally Posted by overclockerjames View Post

Scythe are gone too
http://www.newegg.com/Product/Product.aspx?Item=N82E16835185092

 

FrozenCPU has them in stock (for now) http://www.frozencpu.com/products/10323/fan-674/Scythe_Gentle_Typhoon_120mm_x_25mm_Fan_-_1850_RPM_D1225C12B5AP-15_Hot_Item_.html?tl=g36c15s60&id=eGaVpPgj&mv_pc=3167

post #26 of 28
Quote:
Originally Posted by TwoCables View Post
 

The Air Pressure rating of the XtraFlo is kind of weak. I wish we could still get the fan below in the retail packaging:

 

http://www.svc.com/y720dcd-25t1-gp.html

 

I don't know if you'll only get the fan, or if you'll get the fan with its fan controller, but this fan is everything you're looking for (except for maybe the blue LED lights, if I haven't missed my guess).

 

Anyway, the CFM rating is up to 110, the RPM is up to 2500, and the air pressure rating is up to 5.6 vs. the 3.3 of the XtraFlo.

 

I have two on my Frio. When they're both at 2500 RPM, it's not as loud as you'd think. At 2500 RPM, it also has a very nice quality of sound, unlike how some fans are whiny and whatnot. I love these fans and I wish Cooler Master would have stuck with this design as a standard design, offering non-LED versions too. They had a real winner here. I don't know why it's being phased out like this. It used to be available everywhere, now I can only find it in OEM packing at SVC. Just 6 months ago or a year ago, they had the Retail packaged ones too.


I bought a pair of those a few years ago. For $5, with rheostats, they're pretty good fans, and they have blue LED's. They do come in retail packaging, and they're old. So if SVC has run out of them there might not be any more.

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post #27 of 28
Quote:
Originally Posted by ehume View Post
 


I bought a pair of those a few years ago. For $5, with rheostats, they're pretty good fans, and they have blue LED's. They do come in retail packaging, and they're old. So if SVC has run out of them there might not be any more.

 

No, they used to come in Retail packaging from SVC. Now it says that they're OEM only. Although, adding one to the cart shows that they're out of stock and I would guess that they're not getting any more. Over the past 4 years or so, this fan has been increasingly harder and harder to find.

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post #28 of 28
CM fans are all utter garbage. Nowhere near rated specs and besides you aren't getting 90CFM or the fan would be literally flying away considering how light a CM fan is. I've felt 152CFM (FFB1212VHE to cool my head down :D_ and i really know what 90CFM feels like ... besides, i do have a wind-speedometer
1) Their noise rating is essentially what they take a reading at lowest speed. Or thereof
2) CFM rating is open-air and artificially inflated
3) Static pressure rating, god knows where they pulled those numbers off

Besides,
http://www.overclock.net/t/1404897/corsair-carbide-air-540-owners-club-gallery/2610#post_20975735

To back myself up, it's not like i wouldn't try out a BladeMaster,XtraFlo,Jetflo,Sickleflow before talking crap about them. I have indeed tried out every single one.
And i bought 2 each from different months so i'm sure it isn't a batch problem tongue.gif
Ended up selling them off for more than what i paid so win-win smile.gif

So on my fan test bench (Proper restriction with filters+honeycomb rack+mesh and a HDD rack with 3 sideways 3.5" HDDs in it) reveals they push at best 10CFM ... that's laughable ...
Edited by DaveLT - 10/16/13 at 7:55pm
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Ayase Eli
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