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post #31 of 44
I have really been thinking of doing more fan testing, I am just broke at the moment.

I moved for a new job and paying for two mortgages and and apartment while we transition. At 15-25 buck a pop, I could easily spend $100 on fans that are useless to me at the end just to test a handful. I still have probably 30+ spares of fans from previous testing collecting dust that I may just throw away to make room.

We will see. Maybe if i start a new round with the kit fans I'll get a few interested in loaning me some samples or something.
    
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post #32 of 44
Thread Starter 
Quote:
Originally Posted by Martinm210 View Post

I have really been thinking of doing more fan testing, I am just broke at the moment.

I moved for a new job and paying for two mortgages and and apartment while we transition. At 15-25 buck a pop, I could easily spend $100 on fans that are useless to me at the end just to test a handful. I still have probably 30+ spares of fans from previous testing collecting dust that I may just throw away to make room.

We will see. Maybe if i start a new round with the kit fans I'll get a few interested in loaning me some samples or something.

Why not trying to sell them?
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post #33 of 44
Thread Starter 
Quote:
Originally Posted by Martinm210 View Post

I have really been thinking of doing more fan testing, I am just broke at the moment.

I moved for a new job and paying for two mortgages and and apartment while we transition. At 15-25 buck a pop, I could easily spend $100 on fans that are useless to me at the end just to test a handful. I still have probably 30+ spares of fans from previous testing collecting dust that I may just throw away to make room.

We will see. Maybe if i start a new round with the kit fans I'll get a few interested in loaning me some samples or something.

Why not trying to sell them?
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post #34 of 44
Quote:
Originally Posted by Martinm210 View Post

I have really been thinking of doing more fan testing, I am just broke at the moment.

I moved for a new job and paying for two mortgages and and apartment while we transition. At 15-25 buck a pop, I could easily spend $100 on fans that are useless to me at the end just to test a handful. I still have probably 30+ spares of fans from previous testing collecting dust that I may just throw away to make room.

We will see. Maybe if i start a new round with the kit fans I'll get a few interested in loaning me some samples or something.
Honestly, if I worked in industry related to watercooling, I would be raining my products on people like you for reviews. For the price of single piece of equipment you not only get public coverage, but also get invaluable feedback for future improvement. Marketing departments are sure don't know their job.
Quote:
Originally Posted by Paps.pt View Post

Why not trying to sell them?

You have to think like a reviewer to understand. In my opinion it is worth keeping old but still relevant stuff in case of upgrade of current testing bench\methodology to rerun them for comparison. Doubt it is sentimental value alone.
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post #35 of 44
Fans are funny that way, I think most fans are simply outsourced copies from very few larger manufacturers. It's a set of specs to make the fan look different and unique and rebranded to give the consumer a feeling that they are special. It does not take much to see a lot of similarities in some while other do spend some time making custom molds and decoupling systems. But I think outsourcing leads to very limited innovation. You need the ability to engineer the motor and aerodynamics of the blade geometry which I think is limited to those that specialize in dc motor and fan fabrication. It is probably a huge cost too and the PC cooling market probably isn't big enough to cover that sort of R&D cost. It's the massive Delta, Sanyo Denki, Yate Loon, and Servo Nidecs of the industry that have the ability and they generally don't care about reviews, they care about making fans that perform for their customers which is those that order massive quantities.

We are then left with small pc cooling companies that order fans to be produced from the big guys and they are looking for advertising not scientific review. Science will simply point out the rebranding performance result that they have yet another fan that performs much like all the others.

A new molded blade and frame slapped on a previous motor/bearing design using ordering specs is mostly cosmetic rebranding. If you want to sell rebranding you will see those such as TTL who review fans with a microphone and 30 minutes of subjective opinion without any scientific measurement.

They don't want science or quantitative noise analysis, that will tell the truth..smile.gif

The only fans I have ever found special are:

-Delta AFB1212VHE/SHE/HHE rev3 series. these are the best high speed fans I have tested, just not good low speed fans. Exemplary CFM/noise ratio but a poor slow speed fan as all high speed 38mm fans are.
-Servo Nidec Gentle Typoon series both AP-13 thru 15 slow speed models and the Ap-29 series great medium speed fans. Exemplary CFM/noise ratio, but some harmonics issues at certain rpm and not really much diffferent under 1000rpm than a yate.
-Yate Loon excellent value and slow speed fan. I find their performance equal or better to most fans at a fraction of the price. Nothing special in terms of CFM/noise but decent and under 1000rpm pretty close to the same as much more expensive fans. Not the prettiest, just a black plain fan.
-Noise blocker - Like a yate loon but higher end motor. Nothing too special with CFM/noise ratio, but very good noise quality. I don't think the price is really justified over a yate but they generally do make a nice smooth motor and quality fan. Also a little nicer looking and nice packaging extras.

Then there are other fans. Most perform much like a yate loon at a much higher price. Many are much nicer looking no doubt, but performance is usually much the same. Minor differences and some are much worse with gimmicks that just don't work (such as perforated frames), but in the end...another fan with a different look and packaging.

Any brand fan could very easily record a video of their fan running on a radiator with a sound level meter on display measuring performance compared to the competition if their fan was actually special that way. If all they give are fancy diagrams and loads of subjective description absent of any sort of comparative quantitative data...you might say hmmmmm.

They don't want science to show they are just another rebranded fan that discounts the "special features". Pretty much all my fan testing was sponsored by forum members. I had a couple of rebrands ask me to test their fan privately only to find their fan was average. They stopped sending me samples..go figure..smile.gif

Anymore I only get requests for testing from those that do the R&D and feel they have something special to offer and that generally doesn't include fans..smile.gif
    
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post #36 of 44
Martin, I enjoyed insight a lot. Very enlightening. Never through about rebranding in a fan industry, makes sense.

- I have two of those Delta AFB121SHE, recovered from server PSU, which we couldn't use anywhere. Scored my best air overclocks on them. My guess would be that Ultra Kaze is the cheaped version of Deltas.

- Yate Loons are so typical and bland looking, that not many people using them, since watercooling right now primary is all about being awesome.

- Sanyo Denki now often seen in some high end PSUs like Seasonic. In my opinion they have very nice sound signature. However retail price is just insane.

- Noise blocker recently released eLoop, which certainly looks like nothing I've seen before. Dunno if there is something behind fancy appearance and loads of ®s. I have learned not to trust fan specs, unless they are printed in datasheet of serious industrial manufacturer.

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post #37 of 44
Thread Starter 
Martin, in your opinion would it be ok to use the Noctua nf-f12 in pull and a gt15 in push on a 40mm thick high fpi radiator?
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post #38 of 44
Quote:
Originally Posted by Paps.pt View Post

Martin, in your opinion would it be ok to use the Noctua nf-f12 in pull and a gt15 in push on a 40mm thick high fpi radiator?

Absolutely, I encourage mixing of fans and have done it many times. The mixing fan phobia generate by forum members is really just another forum myth by users not knowing. I have yet to see any testing to show it being a problem. Actually I have found mixing two different fans to be a benefit at times. When testing the H220 I found two AP15s plus two Helix to be a great match. The helix alone seemed to have a little harmonic under pressure in push only that goes away and smooths out when the GTs were added. Also anytime you mix like fan speeds you can get rpm harmonics so having fans at speeds that are a few hundred off is a good thing.

Noctua even does mixing of fans and speeds on their NH-D14.

While it may not make sense to mix 5000rpm Deltas with 1200rpm yates, I sure wouldn't worry about 500rpm differences particularly when resistance like a radiator is keeping air flows well below either fans max air flow rate. Mixing fans is a good thing..smile.gif
    
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post #39 of 44
Thread Starter 
Quote:
Originally Posted by Martinm210 View Post

Absolutely, I encourage mixing of fans and have done it many times. The mixing fan phobia generate by forum members is really just another forum myth by users not knowing. I have yet to see any testing to show it being a problem. Actually I have found mixing two different fans to be a benefit at times. When testing the H220 I found two AP15s plus two Helix to be a great match. The helix alone seemed to have a little harmonic under pressure in push only that goes away and smooths out when the GTs were added. Also anytime you mix like fan speeds you can get rpm harmonics so having fans at speeds that are a few hundred off is a good thing.

Noctua even does mixing of fans and speeds on their NH-D14.

While it may not make sense to mix 5000rpm Deltas with 1200rpm yates, I sure wouldn't worry about 500rpm differences particularly when resistance like a radiator is keeping air flows well below either fans max air flow rate. Mixing fans is a good thing..smile.gif
Thanks again m8. I think I will try to put the Noctua NF-F12 in pull mode and a gt15 1800 rpm in push mode. The noctua connected to the Motherboard PWM cpu fan header and the Gt15 connected to the mb chassis header (3 pin). My only fear is if 1800 rpm is too loud, do the gt15 come with a low voltage adapter or would it be better to buy a lower RPM GT? I don't have a fan controller.

Edit : I'm not quite sure but I think the asetek 760gc (cpu +gpu) wc aio kit has a 3 pin fan connector were I could connect the gt15, and I believe it will adapt the fan speed to the cpu temp... My research results have been contradictory
Edited by Paps.pt - 4/21/13 at 4:39am
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post #40 of 44
Quote:
Originally Posted by Paps.pt View Post

Thanks for those. So in your opinion you recommend the gentle typhoons ap-15?are they PWM?

http://www.youtube.com/watch?v=Iq_LeeCB63g

I don't know for you but I've seen plenty of review on those gt and they all go over 50-55 DB witch would prove the graph wrong.
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