Question about fans

Andreas W · 28 Jun 2013

Last update and conclusion I guess, and in my scenario 1 scythe gentle typhoon as pull perform exactly the same as 2x noctuas in a push/pull configuration, and even if the fan runs at 1720/1850 rpm the sound is not that noticeable it does sound a bit higher then 1 noctua fan but less then 2 it does seem to have not sure how to explain the noise but there is something I just cant explain it but not something that would drive you that nuts.

So final words I am a tad disappointed in the noctuas actually since 1 scythe cost 20-22 $ for me while 2x noctuas cost about 56 $. And one thing I did not like about the scythe was that the cable was not sleeved and it was shorter then the ones on the noctuas so I do need really short fan extender cable so I could hook it up to my modtoy 8 fan controller thingy because atm the scythe is connected to the motherboard which I am not too happy about

Layback Bear · 28 Jun 2013

Thank you very much for getting back with the test results.
Were the temps close using both methods?

Andreas W · 28 Jun 2013

Layback Bear said:

Thank you very much for getting back with the test results.
Were the temps close using both methods?

With push/pull with the 2 noctuas my idles where at 32-33 full load was 59-60
With a single noctua as pull my idles where 35-37 full load was 64-65
With a Single Scythe as pull my idles are a solid 34 (few times go down to 33) full load was 58-59

So I would say they are pretty close to each other and with a single fan I would guess the H80 would gather less dust, the Scythe does have that noise I cant describe not sure if this is because of my open 800D or if that's how it actually sound, but that sound does get a bit annoying after I have been listening to it for a while. So even if the 2 noctuas sounded a bit more the sound that came from them sounded much softer, will give the scythe a go at 7v as it just hit me I forgot to test it with that

NoN · 30 Jun 2013

Andreas W said:

Hi, im using a H80 with 2x noctua fans NF-P12 but after seeing a lot of videos on youtube and Reading a bit on various forums I seem to see that "Scythe Gentle Typhoon Fan 1850 rpm" comes up all the time as their preferred radiator fan, would that fan work better or the same alone instead of the 2 noctua fans, want to use it as pull I hope I am thinking correct there, it would be case->fan->h80 and it to exhaust the heat out of case, or should I got with 1 Corsair SP120?

And might as well ask this here also instead of making a new thread about it, but is there anyone that are or have used EnzoTech MOS-C10, do they help? the plan is to use them on my motherboard

I readed while getting interested in choosing components for watercooling my system, that FPI (Fins Per Inch) of the radiators will decide what kind of fans it should fit on it. Low FPI density for quiet fans of 800rpm to 1500rpm and high FPI density with the factor of louder dBs for 1800rpm to 2200rpm fans.

Therefore the differences of temps are not that so impressive between low FPI w/quiet fans and high FPI w/louder fans.

Also fans static pressure on push is more important than in pull.

Andreas W · 01 Jul 2013

NoN said:

Andreas W said:

Hi, im using a H80 with 2x noctua fans NF-P12 but after seeing a lot of videos on youtube and Reading a bit on various forums I seem to see that "Scythe Gentle Typhoon Fan 1850 rpm" comes up all the time as their preferred radiator fan, would that fan work better or the same alone instead of the 2 noctua fans, want to use it as pull I hope I am thinking correct there, it would be case->fan->h80 and it to exhaust the heat out of case, or should I got with 1 Corsair SP120?

And might as well ask this here also instead of making a new thread about it, but is there anyone that are or have used EnzoTech MOS-C10, do they help? the plan is to use them on my motherboard

I readed while getting interested in choosing components for watercooling my system, that FPI (Fins Per Inch) of the radiators will decide what kind of fans it should fit on it. Low FPI density for quiet fans of 800rpm to 1500rpm and high FPI density with the factor of louder dBs for 1800rpm to 2200rpm fans.

Therefore the differences of temps are not that so impressive between low FPI w/quiet fans and high FPI w/louder fans.

Also fans static pressure on push is more important than in pull.

I see, I used pull as a video on youtube explained it would reduce dust and it would be easier to clean. And after checking H80 seem to have a 20 FPI and I would take that as low? meaning max 1500 rpm so my noctua fan that runs at 1300 is well suited for this if I understand it correct, And I did not test push as I cant fit my h80 directly onto my case as the bottom of the h80 rad is hitting the start of the pci slot part on my 800D in the back. Thanks for the info

NoN · 01 Jul 2013

Andreas W said:

NoN said:

Andreas W said:

Hi, im using a H80 with 2x noctua fans NF-P12 but after seeing a lot of videos on youtube and Reading a bit on various forums I seem to see that "Scythe Gentle Typhoon Fan 1850 rpm" comes up all the time as their preferred radiator fan, would that fan work better or the same alone instead of the 2 noctua fans, want to use it as pull I hope I am thinking correct there, it would be case->fan->h80 and it to exhaust the heat out of case, or should I got with 1 Corsair SP120?

And might as well ask this here also instead of making a new thread about it, but is there anyone that are or have used EnzoTech MOS-C10, do they help? the plan is to use them on my motherboard

I readed while getting interested in choosing components for watercooling my system, that FPI (Fins Per Inch) of the radiators will decide what kind of fans it should fit on it. Low FPI density for quiet fans of 800rpm to 1500rpm and high FPI density with the factor of louder dBs for 1800rpm to 2200rpm fans.

Therefore the differences of temps are not that so impressive between low FPI w/quiet fans and high FPI w/louder fans.

Also fans static pressure on push is more important than in pull.

I see, I used pull as a video on youtube explained it would reduce dust and it would be easier to clean. And after checking H80 seem to have a 20 FPI and I would take that as low? meaning max 1500 rpm so my noctua fan that runs at 1300 is well suited for this if I understand it correct, And I did not test push as I cant fit my h80 directly onto my case as the bottom of the h80 rad is hitting the start of the pci slot part on my 800D in the back. Thanks for the info

Tha's the most common response i got in search through forums & reviews:

High FPI = High CFM/RPM

Low FPI = Low CFM/RPM (higher ones will work better but are not required).

Looks 20FPI is a dense radiator that needs high CFM/Good Static Pressure, most recommend 1500Rpm to 1800rpm for that amount of FPI. So might your Scythe Gentle typhoon choice not bad ones.

Andreas W · 01 Jul 2013

NoN said:

Andreas W said:

NoN said:

I readed while getting interested in choosing components for watercooling my system, that FPI (Fins Per Inch) of the radiators will decide what kind of fans it should fit on it. Low FPI density for quiet fans of 800rpm to 1500rpm and high FPI density with the factor of louder dBs for 1800rpm to 2200rpm fans.

Therefore the differences of temps are not that so impressive between low FPI w/quiet fans and high FPI w/louder fans.

Also fans static pressure on push is more important than in pull.

I see, I used pull as a video on youtube explained it would reduce dust and it would be easier to clean. And after checking H80 seem to have a 20 FPI and I would take that as low? meaning max 1500 rpm so my noctua fan that runs at 1300 is well suited for this if I understand it correct, And I did not test push as I cant fit my h80 directly onto my case as the bottom of the h80 rad is hitting the start of the pci slot part on my 800D in the back. Thanks for the info

Tha's the most common response i got in search through forums & reviews:

High FPI = High CFM/RPM

Low FPI = Low CFM/RPM (higher ones will work better but are not required).

Looks 20FPI is a dense radiator that needs high CFM/Good Static Pressure, most recommend 1500Rpm to 1800rpm for that amount of FPI. So might your Scythe Gentle typhoon choice not bad ones.

The problem is that the scythe sounds horrible at 1850 rmp or 1720 when I ran it from my cpu fan slot on my motherboard. I tried a different thing and plugged in the scythe as a pusher using 7v that leaves it at around 1080 rpm making it pretty much silent and then use my noctua as pull at 12v so that one runs at 1300 rpm this gives me the same temps as both noctua fans at 12v but with a bit lower noise so atm I will most likely just leave it like this. If I want better temps not that I think I do but if I want I should be running 1500 fans, meaning I would need to get a 9v resistor for my scythe 1850 to get down to that speed, the question is how much louder it would be 1450 rpm

Edit 1: OK got a weird idea I wanted to test out and now im even more confused, I plugged out my noctua fan its still screwed to the h80 just no power. The scythe is plugged in the front at 12v again but this time the scythe is silent that weird noise I could not describe earlier when I had it plugged into my cpu fan header is not there anymore and because the 1850 rpm the scythe makes it makes my noctua fan in the back spin and technically still help removing heat? the temps is the same as earlier when it ran at 7v and with the noctua fan plugged in

NoN · 01 Jul 2013

Could be a good idea to let Scythe fan in place and use a silicone vibration absorber + 9 volt reducer for that 1850rpm to run at 1500rpm.

But this just depends on what you'll do on your computer while using watercooling to remove the heat.

You could either try find an adapter if you plan to plug them on 3pins header and not using PWM 4pins features, therefore you'll gain control over the spinning rpms.

Seing your motherboard you have also a 4pins header for 1 fan and a 3pins header for another fan
not only the cpu_fan header.

eg: Fan controller
The Nanoxia FCX fan controller allows stepless adjustments of common 3Pin-12V-fans. The FCX can simply be installed into a free slot cover space.
Voltage output range; 7-12V
Max. power consumption: 3W

Andreas W · 01 Jul 2013

NoN said:

Could be a good idea to let Scythe fan in place and use a silicone vibration absorber + 9 volt reducer for that 1850rpm to run at 1500rpm.

But this just depends on what you'll do on your computer while using watercooling to remove the heat.

You could either try find an adapter if you plan to plug them on 3pins header and not using PWM 4pins features, therefore you'll gain control over the spinning rpms.

Seing your motherboard you have also a 4pins header for 1 fan and a 3pins header for another fan
not only the cpu_fan header.

eg: Fan controller
The Nanoxia FCX fan controller allows stepless adjustments of common 3Pin-12V-fans. The FCX can simply be installed into a free slot cover space.
Voltage output range; 7-12V
Max. power consumption: 3W

Want as little wires as possible showing so even if that fan controller was a nice idea I would rather not use it, I did look at a 9v cable but the lovely shipping was 2-3 higher then the cost of the cable so if I wanted 2x of them it would cost me 20 dollars not that I understand why shipping cost so much since they would fit in a regular envelope, but at the same time I do not have the confident to make my own resistor. I did find some anti vibration rubber frame that would help reduce vibrations and isolate the fan making better pressure, and I looked around at the fans spec the scythe 1450 fan have a static pressure of 1.3 noctuas nf-p12 at 1300 have a static pressure of 1.68 and scythe 1850 have a static pressure of 2.

NoN · 01 Jul 2013

there's also that kind of Fan Controller "mCubed" Fan Controller, this particular one had been replaced by a newer model (same size & specs) but still works the same as stand-alone controller.
Also called "mCubed Fan Amp" and cost around 20euros. Those are specially made for watercooling purposes and can be easily hide.