Fan Testing Part 2 (Retesting + Noise)

[Martinm210]

There were a few additional chart relationships being requested, so I'm trying to add those here. I will also add them to the OP.

First is Air Flow Vs. RPM





The San Ace with it's 38mm thickness and curved blades is producing the most per RPM, followed by the Gentle Typhoon.

[Brodholm]

There were a few additional chart relationships being requested, so I'm trying to add those here. I will also add them to the OP.

First is Air Flow Vs. RPM

The San Ace with it's 38mm thickness and curved blades is producing the most per RPM, followed by the Gentle Typhoon.

Thanks! I have nothing else to ask for

And why isn't this sticky yet?

[Martinm210]

You bet!

And here is the:
Noise vs. RPM





A bit messy even blown up, but many of the fans that happen to have a high CFM per RPM also have the downside of a higher noise per RPM with some exceptions. There is some give and take there though on some between more CFM vs Noise per RPM.

[orangekiwii]

Thanks martin, i guess its the typhoons for me

might try to put some lights down there to make it look a bit better but don't really know




the charts are awesome thanks for taking the time to make them

as for my setup i think i'll put some gentle typhoons on the inside of the radiators and the LED fans on the outside, that way i get the light and a mix between them

only issue is if LED fans are loud


EDIT: btw the sound on the videos, when the fans aren't moving is that just ambient air moving over it or something?

if you remove that noise in your mind thats a good noise right?


I don't know exactly how much work this would be as it would probably be different for each fan, but is it possible to get a graph that shows the relationship of the average distance of the sensor and the noise?

i'm just curious if some of those fans that sound medium - kinda loud... would actually sound silent at like 5 feet when in a metal case or something similar

thanks for your work... this should definitely be stickied as it really clears up a lot of the best fans

one thing that might be good to add to your OP is kind of a recommendation thing

like a different fan for each category

high power - UK3 or the Delta SHE

mid power - sflex

low power - gentle typhoon etc... might help those just looking for a good fan and not those actually looking at their individual situation

[Russ_64]

Is it just me (maybe) or do those last two sets of graphs look the wrong way around - my S-Flex F are supposed to be 64CFM at 28dB not 28CFM @ 64dB ???

[orangekiwii]

its radiator airflow which is significantly less versus noise intensity at .5 inches

its just a coincidence that it turned out to basically be reverse

[Mech0z]

Do the GT15 only draw like 1W @ 12V? Thats like very impressive.

[Martinm210]

Thanks martin, i guess its the typhoons for me

might try to put some lights down there to make it look a bit better but don't really know




the charts are awesome thanks for taking the time to make them

as for my setup i think i'll put some gentle typhoons on the inside of the radiators and the LED fans on the outside, that way i get the light and a mix between them

only issue is if LED fans are loud


EDIT: btw the sound on the videos, when the fans aren't moving is that just ambient air moving over it or something?

if you remove that noise in your mind thats a good noise right?


I don't know exactly how much work this would be as it would probably be different for each fan, but is it possible to get a graph that shows the relationship of the average distance of the sensor and the noise?

i'm just curious if some of those fans that sound medium - kinda loud... would actually sound silent at like 5 feet when in a metal case or something similar

thanks for your work... this should definitely be stickied as it really clears up a lot of the best fans

one thing that might be good to add to your OP is kind of a recommendation thing

like a different fan for each category

high power - UK3 or the Delta SHE

mid power - sflex

low power - gentle typhoon etc... might help those just looking for a good fan and not those actually looking at their individual situation

The sound on the videos when the fans are not moving is complete silence. It's the quietest place I have available which is my bedroom walk in closet which doesn't have any windows and tons of clothes that do a pretty good job at absorbing sound. I also tested at night after 8PM when the the most quiet time. So any noise you hear is just static from the microphone. I didn't do any edits to the videos, they were uploaded from the format that came right out of my camera to ensure consistency and provide the highest quality. You should ignore that white noise sound and consider silence.

All tests were done at 1/2" to be compatible with the sound meter I had. I found that you need to spend 300+ dollars on a sound level meter if you want something that can measure below 30db, and that's what you would need to measure at a distance. It would be nice, but I can't do that with the tools I have. Even with that you'd still need to pay attention to the video sounds because noise level doesn't pick up the character of the sound which I think is more important than the actual level.

[Martinm210]

Do the GT15 only draw like 1W @ 12V? Thats like very impressive.

Yes, ...they are very energy efficient as well a whole 1watt a piece is all you need even for the 1850RPM model at full 12V.

One thing that was confusing me about the GT was who made them. I've seen many sites listing them as Scythe and some as Servo Nidec.

I guess if you look at the packaging carefully, it notes the manufacturer is "Servo" which is a "Nidec" company. The box notes "Japan Servo Co., Ltd is the manufacturer, and Scythe just does the distribution. It also notes they are made in Indonesia. It seems most of the Scythe manufactured fans are made in China.

Anyhow, I think that explains why they are so different from normal Scythe fans, they are completely different manufacturers in different places. They only share the same distributor from what I can see.

Scythe is just the distributor, the manufacturer is Servo of the Nidec group company.

Anyhow, if anyone has a need for different formatting, you can get the original excel file here:

I'd attach it here, but the max attachment limit is a measly 200K, I was able to attach it at Overclock though.

http://www.overclock.net/attachments...-fannoise2.zip

Did I forget to mention, THIS TEST IS DONE!!, no more changes except for the last couple of fans headed my way, and that may take a different test method anyhow.

[Mech0z]

Done? You ofc have to put your data into AndreaBZs spreadsheet so we can calculate how big a difference picking the different fans has to do for the temp

Nah this is nice, I hope AndreaBZ puts it into the sheet, would be so wicked. But in the meantime I have to find out if Aquatuning can get GP15s because then I will get a RX480 with 4 of those (maybe 2 in pull, not space for 4) and then I will sell the Rheobus I just bought, havent even recieved it, but my Scythe Kaze is PLENTY with these fans

[ben805]

all these graphs are making my head spin. LOL So, if I want the highest cfm fan with less than 30dB, which one do you guys recommend?

[Martinm210]

Done? You ofc have to put your data into AndreaBZs spreadsheet so we can calculate how big a difference picking the different fans has to do for the temp

Nah this is nice, I hope AndreaBZ puts it into the sheet, would be so wicked. But in the meantime I have to find out if Aquatuning can get GP15s because then I will get a RX480 with 4 of those (maybe 2 in pull, not space for 4) and then I will sell the Rheobus I just bought, havent even recieved it, but my Scythe Kaze is PLENTY with these fans

LOL!

YES. Only planning to test the last few TFC fans headed my way and I'm done with fans. It got a little boring after about the 5th test, and I ran 30 or so fans through about 5 different tests between the PQ and this round. So that was about 150 fan tests, and I've had my filling..

AndreaBZs can take an use the data right from my spreadsheet or anyone for that matter, have at it..

Is this better, I need to be VERY CLEAR?

THIS TEST IS DONE!

This means I am no longer entertaining requests, of any kind, for any reason, for anything.

[Martinm210]

all these graphs are making my head spin. LOL So, if I want the highest cfm fan with less than 30dB, which one do you guys recommend?

30db, I'm assuming you're referring to your usual fan specs.

The Scythe/Servo Nidec Gentle Typhoon D1225C12B5AP-15 is rated at 28dB and would be my favorite so far in the fan power range. It produced more CFM per noise level than all of the other 25mm fans and has a nice sound quality.

I'd still suggest listening to the videos as your basis of judgment. The charts are there for us bean counters, but the videos are only thing to show you what sound tone is like which is much more important than any noise numbers.

I'd suggest listening to the GT as well as some others in that range and take a pick.

[ILikeCosmosS]

the gt has more of motor sound but other fans have the blade and motor sound

i find the gt motor sound makes less sound

[Mech0z]

all these graphs are making my head spin. LOL So, if I want the highest cfm fan with less than 30dB, which one do you guys recommend?

Year I have a hard time finding out how much better the AP15 is compared to the Zalman F3 which previusly have been rated a very good rad fan. (Its half hte price :o) but I might just get the AP15 due to the power usage, the F3 is not bad either there though with 2W @ 12V

[HESmelaugh]

Thanks for this brilliant comparison, Martin. I particularly appreciate the CFM vs. RPM charts. I find it very interesting to see how different fan blade designs (and, I guess, hub sizes) impact a fans performance.

Thanks for putting all the work into this.

[Mech0z]

Martin now that you have that equipment, there is infact one very little test I would ask you do do Could you take a nylon sock and try to put it infront of a fan and see if it affects CFM? I plan on using them for cheap efficient fan filters as I cant find any thin filters.

[Martinm210]

Martin now that you have that equipment, there is infact one very little test I would ask you do do Could you take a nylon sock and try to put it infront of a fan and see if it affects CFM? I plan on using them for cheap efficient fan filters as I cant find any thin filters.

I'll think about it, but not for a couple of weeks. I figure it'll take a couple more weeks for those TFC fans to get here and hopefully by then I'll be done with this Banshee rebuild.

I just got crankcase seals in the mail, so I'll be up to my elbows in 2 stroke parts and greasy/oily goodness. Fans are taking a back seat until I have a running quad..

[Sadasius]

Martin now that you have that equipment, there is infact one very little test I would ask you do do Could you take a nylon sock and try to put it infront of a fan and see if it affects CFM? I plan on using them for cheap efficient fan filters as I cant find any thin filters.

A filter test has been done already. Including panty hose!

http://www.xtremesystems.org/forums/...d.php?t=209801

[skinnee]

Stellar as always Martin!

I'm just trying to figure out how I can harvest all this for hosting. Maybe we should chat about that.

[Brodholm]

Now it have some glue on it (thanks to vapor)

Fans:

* NEW! Fan Testing Part 2 (Retesting + Noise) by Martinm210
* Fan PQ Curve Testing - Part 1 by Martinm210
* Wire Mesh/Filter/Fan Grill Testing by ScottAllyn
* Fans Review (Round 2) by Vapor
* Fans Review (Round 3) by Vapor

[Mech0z]

A filter test has been done already. Including panty hose!

http://www.xtremesystems.org/forums/...d.php?t=209801

Damm, didnt think it would stop flow that much, its like 20%

[Sadasius]

Damm, didnt think it would stop flow that much, its like 20%

Well it also depends on how much you stretch it out too. The more you stretch it out the bigger the holes and the more air is allowed in. So basically just stretch it to where you want it.

[jmke]

for those who want to data mine, Martin provide our site with the data which we hosted here, it includes detailed results per fan with the youtube vids integrated

[Brodholm]

for those who want to data mine, Martin provide our site with the data which we hosted here, it includes detailed results per fan with the youtube vids integrated

Holy ! This should be in the first post also!

But the site has a really bad layout IMHO. Not the test but the site :\