Coolermaster 90CFM 19dBA 2kRPM fans

[leathal]

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

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

[Vapor]

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

In a previous thread of yours.

[IanY]

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!!!

Leathal

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.

[leathal]

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.

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.

Leathal

[Eddie3dfx]

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

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

[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.


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

[Giannis86]

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


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

[leathal]

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.


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

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

[eXa]

LMAO 19DB @ 2k rpm...

[MpG]

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.

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.

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

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.

[rehpyc]

Should probably learn when to just call your defeat..

[1Tanker]

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

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.

[disruptfam]

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

[lyl]

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

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

[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..........

[Navanod]

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...

[Vapor]

You're basically trolling at this point.

[leathal]

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..........

Damn you are such a fool.

Leathal

[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.

[Vapor]

Damn you are such a fool.

Leathal

buh bye

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.

[IanY]

Haha ouch

[iboomalot]

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***

[MpG]

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.

[Navanod]

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.

Yes I am

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



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

[Martinm210]

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

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.