Coolermaster 90CFM 19dBA 2kRPM fans

I just got my 20 fans yesterday from Singapore, and plugged one to to try it out as many of you stated before that at 2k RPM there is not way the fan would be 19dBA, well your wrong.

I used my Panasonic RR-US430 pocket digital recorder to record the sound of the fan at close and 1/2 a foot a away after dampening the sound in my room as much as I could. My current machine is loud enough that it would probably add a couple of 2dBA to the overall sound I recorded. The problem now is getting the audio off the recorder as I lost the CD that goes with it and Panasonic doesn't make it available on their site!!! (SIGH)

So either I will get it next week and upload the wavs here or everyone will have to wait until I get my Blackberry Bold! :-)

Here are some pictures of one of the fans.

The next plan for me is to order a case from mountain mods, and RADs. I see from galery that everyone who has bought a UFO case of some sort has bought a black one, after having a few black cases in my PC career and seeing how they are attracted to scratches I am going with the white powder coated case.

Then have to experiment with my own custom flow system.

Leathal

http://www.smoothrunnings.ca/images/...r/fan-pic0.jpg

http://www.smoothrunnings.ca/images/...r/fan-pic1.jpg

http://www.smoothrunnings.ca/images/...r/fan-pic2.jpg

http://www.smoothrunnings.ca/images/...r/fan-pic3.jpg

They look pretty, but will wait on further opinion/testing.

Sure, anything you say...;)

{goes and grabs popcorn and beverage}

i had some 100+cfm coolermaster led fans rated at 16.5db (at silent mode)
i have to mention that at silent mode they were inaudible..
however at full speed i wasnt impressed at all..the pressure seems to be very low and its quite ineffective on a rad

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Originally Posted by Giannis86

i had some 100+cfm coolermaster led fans rated at 16.5db (at silent mode)
i have to mention that at silent mode they were inaudible..
however at full speed i wasnt impressed at all..the pressure seems to be very low and its quite ineffective on a rad

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Oh... and you got 100+ cfm from the fan and it produced only 16.5 dB at the same time, right ? :ROTF::rofl:

I don't know how the OP can be so naive :p:

Quick.. let's throw out the San Ace fans !!! Those stink compared to these Coolermasters !!

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Originally Posted by jmc

well if those specs are true that would be the holy grail of fans..
maybe vapor knows something about these fans..

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Again...

The number of blades and their design is the primary key to any fans performance, rotational speed obviously helps but isn't as important.

At the end of the day it comes down to what the application requirements are.

If you want to test the coolermaster fans I bought the only place you are going to find them is in New Zealand and in Singapore. Coolermaster doesn't make them in the USA and has no intention in doing so at they feel the US market application requirements are different.

Here is the link again!
http://www.coolermaster.com/products...ate=36&id=4355

Leathal :)

Hehehehe... I *am* Singaporean :D and I have a steady supply of hardware coming from Singapore :) The next shipment within 2 weeks. But I have a faster way of finding out .. my brother is there and works right next to the SLS computer mall :)

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Originally Posted by IanY

Hehehehe... I *am* Singaporean :D and I have a steady supply of hardware coming from Singapore :)

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So stop being a whimp and go get one and do some testing. :D

Have to done any write up's on these fans? Lets see it! ;)

Leathal

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Originally Posted by IanY

Oh... and you got 100+ cfm from the fan and it produced only 16.5 dB at the same time, right ? :ROTF::rofl:

I don't know how the OP can be so naive :p:

Quick.. let's throw out the San Ace fans !!! Those stink compared to these Coolermasters !!

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As i said it was rated at 16.5db at silent mode..obviously it doesnt produce 100+cfm at silent mode..at full speed mode it was rated at 100+cfm..

The main point i wanted to make in my previous post is that coolermaster fans are not suitable for rads

I will know in about 10 hours when my brother wakes up with a hang over from his Saturday partying.


Sleeve bearing

R4-L2R-20CK-GP "90 cfm" model
R4-L2R-20AC-GP "70 cfm" model

contacted my posse at hardwarezone.com.sg and sg.vr-zone.They are available at PC Themes, Ban Leong, Fuwell, Bell, Skylet. Lots available, and I wonder why, especially if its so fabulous :)

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Originally Posted by Giannis86

As i said it was rated at 16.5db at silent mode..obviously it doesnt produce 100+cfm at silent mode..at full speed mode it was rated at 100+cfm..

The main point i wanted to make in my previous post is that coolermaster fans are not suitable for rads

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Obviously.. sorry the sacarsm it wasn't aimed at you... it was at the OP.

My apologies.

Here... 31 pages of forum thread on a fan, just to conclude that its ratings are bogus and its radiator performance is weak.

http://forums.hardwarezone.com.sg/sh....php?t=1910596

This is an elementary review of the 70 cfm version

http://www.overclockersclub.com/revi...ster_hyper212/

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Originally Posted by yanyewkay
my fan vibrates badly regardless horizontal or vertical. in fact there's no difference.

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Originally Posted by FD Trinitron
Yah, I really doubt it's 90cfm.
I dun really find it noisy but I find the airflow rather "weak" as compared to my TT BigTyp VX's fan.
After replacing 1x case fan from the NZXT Alpha & the TT BigTyp VX cooler while the TT fan replaced the original exhaust fan of the NZXT chasis, I expect to bring the CPU temp down .
But I was disappointed.
On idling, it showed improvement of 2'C but onload it's few deg higher than previous setup.
Think tonight I'll have to swap the exhaust fan & the CPU fan, confirmed the TT one has a stronger airflow though it's rated 86cfm. Wonder how & base on what CM rate it as 90cfm?

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You have to understand why people are sceptical.
Tons of testing.studying has been done on fans and then all of a sudden coolermaster comes out with a fan that essentially defys everything that has been tested including I'm sure some scientific theories.
Damn, the people are coolermaster must be some sort of alien r&d team :D

Vapor must have reviewed over 100 fans by now, if not more. Anything resembling over 60+ cfm generates a good 33+ dB. The very best San Ace fan generates 105 cfm at 42 dB.

Now, how is 90 cfm at 19 dB remotely possible ?

19Db above ambient noise maybe ? I would believe an 19db delta lol No way in hell it double some of the best fans CFM while making less noise.

leathal got hosed...he could have had 110CFM and 16dBA with Coolermaster's 2500RPM model :rolleyes:

In all seriousness though: http://www.xtremesystems.org/forums/...6&postcount=27 (other posts in that thread are pertinent too...like where I quickly TEST the 2500RPM version of the fan just for him)

I was going to call BS..

my yates
# Air Flow: 88 CFM
# Fan Speed: 2200 RPM
# Noise Level: 40 dBA

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Originally Posted by Tonucci

19Db above ambient noise maybe ? I would believe an 19db delta lol No way in hell it double some of the best fans CFM while making less noise.

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Room ambient in a graveyard is like... 25 dB.. 19 dB puts that into Sunon category !! That's assuming a dead quiet environment. LoL

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Originally Posted by IanY

I will know in about 10 hours when my brother wakes up with a hang over from his Saturday partying.


Sleeve bearing

R4-L2R-20CK-GP "90 cfm" model
R4-L2R-20AC-GP "70 cfm" model

contacted my posse at hardwarezone.com.sg and sg.vr-zone.They are available at PC Themes, Ban Leong, Fuwell, Bell, Skylet. Lots available, and I wonder why, especially if its so fabulous :)

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Well for starters they Coolermaster USA doesn't carry anything on the global Coolermaster site so they are not available in North America unless people are importing them on their own... either way they are not distributed in mass quantity in NA, so not everyone has them or knows about them... ;)

The sites you list are all on the other side of the world!!! :D

Leathal

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Originally Posted by leathal

Well for starters they Coolermaster USA doesn't carry anything on the global Coolermaster site so they are not available in North America unless people are importing them on their own... either way they are not distributed in mass quantity in NA, so not everyone has them or knows about them... ;)

The sites you list are all on the other side of the world!!! :D

Leathal

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IanY's point was, if they are so great, why are there so many on the shelves where you can get them.

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Originally Posted by Waterlogged

IanY's point was, if they are so great, why are there so many on the shelves where you can get them.

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Well there is a couple of simple reason for that:

1. people come to sites like this one to see what other people are using so they go and buy the exact same thing without spending days or weeks looking through the internet trying to figure out what they should get on their own.

2. the fans are only available in Asia and parts of Australia (it seems), it took me about a week to figure out that Coolermaster NL was completely useless when it came to getting any information out of them as to were I could purchase the fans from. It it took more time to find a place in Asia that would ship the fans to Canada (were I am located). So do you think people abroad would go to the extent I have had to go to get 20 fans? Probably not! :D

3. WC'ers and AC'ers are too skeptical when it comes to technology to try out new things, all the posts I have seen on this site and the one IanY posted suggest people are more willing to say the possibility the fans are 19dBA is a load of crap instead of buying and testing a new $12/$14 piece of technology. :)

So you guys can believe what you want, but I have the fans (all 20) in hand and so far I can tell you the are super quiet but push a lot of air; since I don't have millions to spend on a dBA meter I can't really test it but they are certainly a lot quieter than the Coolermaster clear LED blue 120mm fans I have in my Thermaltake case right now.

You can argue to disagree or disgree to argue, idc! ;)

Leathal

Dude, you're absolutely unequivocally retarded if you think 90cfm or above can be generated with 19dba.

well if you have so many, send or sell one to vapor or martin so they can use the same testing methods to test it like all the other fans. then a true comparison can be made. this is the internet, so you can claim anything you want without proper testing methods, and no one will believe you

oh btw, i have some secrete fans named XXXX too that produce a tornado, at only 7dba

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Originally Posted by WhiteFireDragon

well if you have so many, send or sell one to vapor or martin so they can use the same testing methods to test it like all the other fans. then a true comparison can be made. this is the internet, so you can claim anything you want without proper testing methods, and no one will believe you

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I don't need it...I have the 2500RPM version of the fan that's rated at 110CFM and 16dBA (well, this one has dual ball bearings rather than sleeve bearings at least). In fact...the review might be up tonight.

I did post a mini-preview of it in another thread.

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Originally Posted by Vapor

I don't need it...I have the 2500RPM version of the fan that's rated at 110CFM and 16dBA (well, this one has dual ball bearings rather than sleeve bearings at least). In fact...the review might be up tonight.

I did post a mini-preview of it in another thread.

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Link it plz! :-)

Leathal

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Originally Posted by WhiteFireDragon

well if you have so many, send or sell one to vapor or martin so they can use the same testing methods to test it like all the other fans. then a true comparison can be made. this is the internet, so you can claim anything you want without proper testing methods, and no one will believe you

oh btw, i have some secrete fans named XXXX too that produce a tornado, at only 7dba

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Well if you are going be such a jerk about it.. LoL

I know some where on this planet we live on is a 120x120x38 fan that produces the same winds as a F5 tornado at 1.785dBA. ;)

Leathal

http://www.xtremesystems.org/forums/...9&postcount=35

In a previous thread of yours.

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Originally Posted by leathal

Well for starters they Coolermaster USA doesn't carry anything on the global Coolermaster site so they are not available in North America unless people are importing them on their own... either way they are not distributed in mass quantity in NA, so not everyone has them or knows about them... ;)

The sites you list are all on the other side of the world!!! :D

Leathal

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Those forums and those shopping sites are all entirely in Singapore. You said that you bought your fans from Singapore and they are not available in the US, but they are strangely available in Brazil and the rest of Latin America.

Incidently, which store in Singapore did you buy the fans from? Because my brother and I probably know almost all of them (its a very small country).

Who else would know more about a product than a bunch of ultra geeks close to the source?

If anything, those guys are even bigger geeks than we Americans.

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Originally Posted by IanY

Those forums and those shopping sites are all entirely in Singapore. You said that you bought your fans from Singapore and they are not available in the US, but they are strangely available in Brazil and the rest of Latin America.

Incidently, which store in Singapore did you buy the fans from? Because my brother and I probably know almost all of them (its a very small country).

Who else would know more about a product than a bunch of ultra geeks close to the source?

If anything, those guys are even bigger geeks than we Americans.

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I think the name of the store was called GooGoo. The guy I was dealing with and possibly the owner, Mr. Wong, was pretty nice. We both learned that wiring money from Canada results in two service fees (sigh) one from my bank which I took care of and the other from his bank which he didn't know until I got him to ask the bank. In all I would buy from him again if I needed anything else. :D

Leathal

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Originally Posted by Kilyin

Dude, you're absolutely unequivocally retarded if you think 90cfm or above can be generated with 19dba.

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Well I guess someone has to call out the pink elephant in the room.
I didn't want to be the first :rolleyes:

They have a similar steep blade angle similar to the skythe slipstreams which is good for open air case type applications, but not so much when on a radiator.

It looks like it has fairly low static pressure for that high of an RPM. Only about .119" H20, where as the Skythe Ultra Kaze has nearly double that amount for the same RPM.
http://www.martinsliquidlab.com/img/...reCompare1.png

Static pressure is what really helps on a radiator especially the more dense radiator types.

noise rating of coolermaster fans are for silent mode...so that 19db is not associated to the 90cfm

anyway, this is the fan i was talking about
Cooler Master Y720DCD-25T1-GP 120mm Blue LED Silent Fan 110CFM 16dBA
http://www.performance-pcs.com/catal.../CM25T1_01.jpg

Info as stated on PPCs (bought them from there a few months ago..)
Manufacturer Cooler Master
Model/ Part No. Y720DCD-25T1-GP
Size 120 x 120 x 25 mm
Airflow 110 CFM
Noise 16.5~38 dBA
RPM 800~2500
Bearing Double Ball
Power Consumption 0.12~0.50A
Pressure 5.6mm
Connector 3-pin and 4-pin
RPM sensing Yes
Weight 350g
Package Retail
Color Clear

when i got my pa120.3 i put one of the fans on it to see what it could do..i soon realized that even at full rpm not much air was going through the rad...they do look nice though, i gotta say :D

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Originally Posted by Martinm210

They have a similar steep blade angle similar to the skythe slipstreams which is good for open air case type applications, but not so much when on a radiator.

It looks like it has fairly low static pressure for that high of an RPM. Only about .119" H20, where as the Skythe Ultra Kaze has nearly double that amount for the same RPM.
http://www.martinsliquidlab.com/img/...reCompare1.png

Static pressure is what really helps on a radiator especially the more dense radiator types.

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Similar to Scythe I agree, however the blades on the Coolermaster are closer together and have more a curve to them than the Scythe Slipstream which I am sure changes the fan's dynamic quite a bit.

Leathal

LMAO 19DB @ 2k rpm...

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Originally Posted by leathal

3. WC'ers and AC'ers are too skeptical when it comes to technology to try out new things, all the posts I have seen on this site and the one IanY posted suggest people are more willing to say the possibility the fans are 19dBA is a load of crap instead of buying and testing a new $12/$14 piece of technology. :)

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:rofl::ROTF:

Are you serious? Did you honestly just suggest that we aren't willing to try new things?!? Seriously, have look around this forum, this sub-section in particular. People here are ALWAYS interested in hearing about new things, good or bad. If there's hard data and empirical testing available, even better.

Hell, I have drawers full of stuff (including two of the 2500rpm fans) that I've bought on a whim to try out, but been disappointed in the end. But the fact is, without serious data skewing and manipulation, those numbers are wildly implausible.

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Originally Posted by Giannis86

noise rating of coolermaster fans are for silent mode...so that 19db is not associated to the 90cfm

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Yeah, I've got two kicking around. Not impressed at all with them. And I'm also skeptical of the claimed 5.6mm of static pressure, since I get considerably more rad airflow from fans rated at only 4mm.

Should probably learn when to just call your defeat..

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Originally Posted by leathal

Again...

The number of blades and their design is the primary key to any fans performance, rotational speed obviously helps but isn't as important.

At the end of the day it comes down to what the application requirements are.

If you want to test the coolermaster fans I bought the only place you are going to find them is in New Zealand and in Singapore. Coolermaster doesn't make them in the USA and has no intention in doing so at they feel the US market application requirements are different.

Here is the link again!
http://www.coolermaster.com/products...ate=36&id=4355

Leathal :)

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I'm sure they're great fans, but 90CFM of air movement is 90CFM of air movement. The air "rushing" alone will be louder than 19db....nevermind the fan motors' noise output.

seems like lying about the specs... silent x anyone?

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Originally Posted by disruptfam

seems like lying about the specs... silent x anyone?

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Exactly. But to be honest, i wouldnt mind having a few of these, for open air fan... i really like the black frame+leds

Guys, you know you're not going to convince leathal of anything, factual or not, proven by testing or not. Leathal is just one more example of the truth of P.T. Barnum's age-old statement, "There's a sucker born every minute."

But, as for how the cfm and dBA ratings are derived.........if you do some deep patent reading, you may begin to dig out the "truth" of the ratings.

For cfm......the ridiculous claims are probably correct, if you replicate their testing methods. Your tested fan is put into a sealed chamber and is exhausting the chamber....much like an exhaust fan's arrangement on the rear of a computer case. Now.....here comes the fakery...........the chamber is fed air by a higher cfm fan. The higher cfm'd fan essentially pressurizes the chamber, or box, that the tested fan is exhausting....so the tested fan has to do no work in obtaining any air into it. Give even a SilenX fan a positive pressurized chamber to pull from and it's easy to see how a SilenX fan achieves its cfm rating.

As for dBA ratings......the faker fans never mention what voltage the sound generation is being taken from, do they? Add to that the way the dBA is derived, it's probably along the lines of SilenX's testing for dBA generation......at the lowest voltage the fan will turn over, take 3 measurements, one on-axis from the intake side of the fan (NEVER the exhaust side.....that'd be too noisy!) and two measurements off-axis, all at 1 meter of distance, and then take the mean of those 3 measurements. Easy to achieve 14dBA or 19dBA or damned near any figure you want to put on your package.

I wish I was as gullible as leathal, instantly believing the marketing drivel and completely suspending all common sense in the process. Must be nice to live in the clouds..........

That fan is so common over here in Singapore, they'll have to be bundling them into "value packs" of 5 fans in a box and selling them at dirt cheap prices to get rid of them...unless they get bulk exported to Canada...

You're basically trolling at this point.

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Originally Posted by C'DaleRider

Guys, you know you're not going to convince leathal of anything, factual or not, proven by testing or not. Leathal is just one more example of the truth of P.T. Barnum's age-old statement, "There's a sucker born every minute."

But, as for how the cfm and dBA ratings are derived.........if you do some deep patent reading, you may begin to dig out the "truth" of the ratings.

For cfm......the ridiculous claims are probably correct, if you replicate their testing methods. Your tested fan is put into a sealed chamber and is exhausting the chamber....much like an exhaust fan's arrangement on the rear of a computer case. Now.....here comes the fakery...........the chamber is fed air by a higher cfm fan. The higher cfm'd fan essentially pressurizes the chamber, or box, that the tested fan is exhausting....so the tested fan has to do no work in obtaining any air into it. Give even a SilenX fan a positive pressurized chamber to pull from and it's easy to see how a SilenX fan achieves its cfm rating.

As for dBA ratings......the faker fans never mention what voltage the sound generation is being taken from, do they? Add to that the way the dBA is derived, it's probably along the lines of SilenX's testing for dBA generation......at the lowest voltage the fan will turn over, take 3 measurements, one on-axis from the intake side of the fan (NEVER the exhaust side.....that'd be too noisy!) and two measurements off-axis, all at 1 meter of distance, and then take the mean of those 3 measurements. Easy to achieve 14dBA or 19dBA or damned near any figure you want to put on your package.

I wish I was as gullible as leathal, instantly believing the marketing drivel and completely suspending all common sense in the process. Must be nice to live in the clouds..........

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Damn you are such a fool. :rofl:

Leathal

Navanod,

I had no idea that you are in Singapore. My borther managed to drop by Sim Lim Square (on a Sunday, when he works beside SLS) and picked himself one for the bargain price of SGD 10. For you American folks, that's closer to US$7. If its that great, it will sell for $17, and not $7. Basically, this is a dubious product in abundant supply. Its in stock all over the place.

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Originally Posted by leathal

Damn you are such a fool. :rofl:

Leathal

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buh bye :up:

Trolling is unacceptable...and then when you get to attacking those who help, you're clearly not at XS to learn or contribute to it.

Haha ouch :)

its simple marketing BS is all

take for example LCD TVs with 10,000:1 contrast ratio that recently popped up.

since the technology can't support this claim but how they arrived at 10,000:1 instead of a true 1,000:1 was by rating the TVs from FULL bright to FULL off

Don't know about anyone else but I don't care if the blacks are black when the TV is off.

Its the same with a fan that is rated at 15db@300 rpm since I don't use the fans at that speed. Its a lie 90cfm or 2000rpm when putting 19db next to the figure.

Too bad we can't hold thier feet to the fire for some truth in advertising.

***jumps off soap box***

Is that what they're doing with the latest generation of LCD TV's? I expect to get one in the next half year or so, and I've noticed the latest batch of 32-37" 1080p's are showing some pretty amazing numbers, yet somehow cheaper than the last generation... Bah. That would explain a few things.

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Originally Posted by IanY

Navanod,

I had no idea that you are in Singapore. My borther managed to drop by Sim Lim Square (on a Sunday, when he works beside SLS) and picked himself one for the bargain price of SGD 10. For you American folks, that's closer to US$7. If its that great, it will sell for $17, and not $7. Basically, this is a dubious product in abundant supply. Its in stock all over the place.

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Yes I am :yepp:

ok, I hope I wasn't the one being shortlisted for any vacations by posting here...

http://i196.photobucket.com/albums/a...eedTroll_2.jpg

but to be fair, that cheap price is actually the saving grace. You cannot accuse the fan of being a SilenX (over priced by virtue of crazy specs)

At $10SGD, I suppose its a decent fan with quite abit of bling for people not too fussy over performance and noise.
If it had been marketed at the low end bling market, I would say its a pretty decent deal

Quote:

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Originally Posted by leathal

Similar to Scythe I agree, however the blades on the Coolermaster are closer together and have more a curve to them than the Scythe Slipstream which I am sure changes the fan's dynamic quite a bit.

Leathal

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There are only two performance measures on a fan, just like a pump...

We have:

Air Flow (Open Air) - This is the maximum air flow without any restriction, just like a pumps maximum flow rate without any restriction. The specs say 90cfm, that's pretty good, but not anything too spectacular considering a medium speed yate loon does 70cfm at 1550 RPM.

Static Pressure (No Air Flow) - The box says we have 3.04mm of static pressure. You can convert that to inches of water using any pressure converting program. The conversion to inches of water is .119" H20.

Per the testing I had done before .119" H20 is not that good, it's better than a medium speed yate loon, but worse than TT thunderblade at 1850RPM, so I can only assume the fan blades have been optimized for open air.

Especially when you compare it to a 38mm fan like the ultra kaze at 2000RPM has nearly .18" vs .119".


I recently measured nearly a 25% gain using two fans in push/pull vs just pull alone on a radiator, and running two fans in this setup simply "nearly" doubles the amount of static pressure, it doesn't add more maximum air flow. So this push/pull test seems to indicate static pressure is really important.

Vapors recent testing on the slipstreams also shows you how lack of static pressure makes the fans actual CFM output through a radiator fall significantly.

Anyhow, it looks like a nice fan, but by the looks of the steep blade angle I think it's a little better optimized for open air conditions like intakes/exhaust on a case.

Also, if its like its 2500rpm brother it aint that silent acording to Vapor. Even undervolted its still ticks.

high RPM = high dBA
tight fan blade gap = high dBA
low dBA advertisement = high dBA
LED fan = high dBA (normally, to cope up the cost)


conclusion = obviously high dBA

lets just put it this way guys, they are 19dBA through noise cancelling headphones; and they are 90 cfm with a windowfan behind them :rofl::rofl::rofl:

Is this that attractive that its worth it?

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Originally Posted by RealRedRaider

LOL

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Shoot me an email RRR.

Viper

I have one of these, it came with my brother's CM Hyper 212, I never even plugged it in, it got replaced with 2x High speed yates.

Dang, someone beat me but I'm going to say it anyway.
They can totally get to 19dB...
with 30dB of attenuation.

MpG for your benefit

http://bitstream.soundandvisionmag.c...dishes-on.html

static or ANSI is the best spec for contrast

http://www.presentationtek.com/2006/...ets-uncovered/

http://www.practical-home-theater-gu...ast-ratio.html


enjoy the readings sorry its off topic