Coolermaster 90CFM 19dBA 2kRPM fans

Printable View

Show 100 post(s) from this thread on one page

07-12-2008, 11:19 AM
Vapor

Quote:

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

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.
07-12-2008, 11:20 AM
leathal

Quote:

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.

Link it plz! :-)

Leathal
07-12-2008, 11:22 AM
leathal

Quote:

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

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
07-12-2008, 11:24 AM
Vapor

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

In a previous thread of yours.
07-12-2008, 11:48 AM
IanY

Quote:

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

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.
07-12-2008, 11:51 AM
leathal

Quote:

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.

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
07-12-2008, 12:35 PM
Eddie3dfx

Quote:

Originally Posted by Kilyin

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 :rolleyes:
07-12-2008, 12:59 PM
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.
07-12-2008, 01:02 PM
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
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
07-12-2008, 02:11 PM
leathal

Quote:

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.

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
07-12-2008, 04:14 PM
eXa

LMAO 19DB @ 2k rpm...
07-12-2008, 10:00 PM
MpG

Quote:

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. :)

: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.

Quote:

Originally Posted by Giannis86

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.
07-12-2008, 10:34 PM
rehpyc

Should probably learn when to just call your defeat..
07-12-2008, 11:14 PM
1Tanker

Quote:

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 :)

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.
07-13-2008, 12:40 AM
disruptfam

seems like lying about the specs... silent x anyone?
07-13-2008, 01:48 AM
lyl

Quote:

Originally Posted by disruptfam

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
07-13-2008, 04:09 AM
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..........
07-13-2008, 07:21 AM
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...
07-13-2008, 07:41 AM
Vapor

You're basically trolling at this point.
07-13-2008, 07:41 AM
leathal

Quote:

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..........

Damn you are such a fool. :rofl:

Leathal
07-13-2008, 07:42 AM
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.
07-13-2008, 07:43 AM
Vapor

Quote:

Originally Posted by leathal

Damn you are such a fool. :rofl:

Leathal

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.
07-13-2008, 07:45 AM
IanY

Haha ouch :)
07-13-2008, 09:02 AM
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***

Show 100 post(s) from this thread on one page