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Tator Tot's Big "Quiet" 120mm & 140mm Fan Round-Up - Page 66

post #651 of 2743
Quote:
Originally Posted by NomNomNom View Post

I can get the turbines at 3.84 a fan and the AP-14's at 11 dollars a fan, i have a fan controller already and i'm putting them on a 20 fpi radiator and a 12 fpi radiator.

Also, to me the Bitfenix spectre pro's are way too loud at 1100rpm for me, just for an idea of my noise tolerance. I'm gearing towards a very quiet pc
post #652 of 2743
Thread Starter 
Quote:
Originally Posted by NomNomNom View Post

I can get the turbines at 3.84 a fan and the AP-14's at 11 dollars a fan, i have a fan controller already and i'm putting them on a 20 fpi radiator and a 12 fpi radiator.
Quote:
Originally Posted by NomNomNom View Post


Also, to me the Bitfenix spectre pro's are way too loud at 1100rpm for me, just for an idea of my noise tolerance. I'm gearing towards a very quiet pc

 

That's cause Spectre / Spectre Pro's are awful.

 

The CF-T12S (Cougar Turbine 120mm models) are definitely quieter than the Spectre Pro's and do an all around better job at cooling.

 

Turbine's have more case resonance than the GT's so you'll want to put some rubber mounts on them if you're putting them on rads, just to keep vibrations down.

 

Other than that, they'll be fine for the purpose. If you really want to maximize that 20FPI rad, I'd pick up an NF-F12 though. It'll be far more efficient as the Turbines will be choked up somewhat.

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post #653 of 2743
Yes the only problem with the noctua is that i could buy nearly 7 turbines at the same price, or even 2 gt's and then some.
Would it be ideal to put turbines on the 12fpi rad, and AP-14's on the 20 fpi rad? Or just keep it turbines.
post #654 of 2743
Thread Starter 
Quote:
Originally Posted by NomNomNom View Post

Yes the only problem with the noctua is that i could buy nearly 7 turbines at the same price, or even 2 gt's and then some.
Would it be ideal to put turbines on the 12fpi rad, and AP-14's on the 20 fpi rad? Or just keep it turbines.

 

At full speed, the Turbines are actually have more static pressure than the GT's, at a slight cost to airflow. 

 

So if you were to split, I'd do GT's on the 12 FPI RAD & Turbines on the 20 FPI rad. 

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post #655 of 2743
Any thoughts regarding squirrel cage blowers? I always liked the idea of them on radiators, cause of the insane pressure. The ones with big outlets ofc. (I know it's been done, and I've seen good results with them noise/performance wise)
post #656 of 2743
Thread Starter 

No experience, so I can't really say. 

 

I've used a few cross-flow fans in the past, which are similar in design. Just not anywhere close in scope. 

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post #657 of 2743
Quote:
Originally Posted by Tator Tot View Post

No experience, so I can't really say. 

I've used a few cross-flow fans in the past, which are similar in design. Just not anywhere close in scope. 

Found an interesting thread... http://www.silentpcreview.com/forums/viewtopic.php?t=13500
post #658 of 2743
It would be awesome if you could go a bit more into detail about the different bearing-types. For example what exactly is the difference between Noctua's old SSO and their new SSO2 bearing and, let's say, the most primitive sleeve bearing. What's the difference between Cougar's and Thermalrights HDB, etc..
This is what really interests me the most, since you are pretty much the only guy i know of that actually looks into this smile.gif

Do you have any sources of information you could link to regarding this subject (bearing types)?
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post #659 of 2743
Thread Starter 

I've got a few PDF's I can dig up for you. Most of them come straight from the manufactures though.

 

A good, basic look into bearing types comes from Protechnic, though they are a bit slanted to their FDB.

http://protechnic.us/Bearing01.html

 

Like wise, you can see some good pictures of the Noctua SSO bearing here:

http://www.overclock.net/t/837831/how-to-repair-a-leaking-noctua-sso-bearing-fan-56k-a-no-no-update-6-10-10

 

Just let me know what you want information on and I'll pull up all the links I can for ya.

 

For a basic run through of your questions though:

SSO Bearing = Sleeve bearing, nothing terrible special about it besides the use of an extra ring at the top to help prevent oil-loss.

Unfortunately, due to design, this ring looses over time / usage, and then the bearing starts to leak. From what I've experienced & seen, it takes about 3 years on most fans. Thankfully they have a 6 year warranty so if you're not into a bit of DIY repair, you can RMA.

 

SSO2 Bearing = 99% a Fluid Dynamic Bearing, the only difference is in the name.

For this guy, I'd suggest starting here:

http://www.legitreviews.com/article/1797/2/

 

That's my original review of the NF-F12 (their first fan to use Focus Flow technology as well as the SSO2 bearing.)

The only other main difference is Noctua uses magnetic force from the sides & bottom (via a small magnet on the back of the fan) to increase stability.

 

 

When it comes down to it, the rifling on the shaft is different than some other OEMs/ODMs, but it's still a fluid dynamic bearing in terms of design.

 

 

Cougar HDB vs Thermalright FDB is gonna be a pretty simple one:

This one is a bit tricky, as Cougar's HDB is made by Power Logic who doesn't publish any information about their bearing.

Thermalright's FDB is made by ADDA, which if you go to that Protechnic link from earlier, you can see their shaft design on the far right.

 

The main difference between these two is that solid chunk ADDA has at the center of the bearing. On S-Flex, Thermalright, & Zalman models, this chunk serves as a stabilizing point for magnets to keep the center rotation of the fan balanced.

 

Cougar/Power Logic's HDB do not have any rifling on the shaft of the impeller but instead on the outer wall of the bearing chamber. The rifling is also done in a different fashion, where it's job it to circulate the oil. Unlike an FDB design where the shaft is rifled so that the oil builds up around it.

 

Similar principle, but two different forms of execution.

 

Really, the only other difference is that the Cougar fans Have no magnetic center to aid balance. Most FDB fans have this.

Cougar's / Power Logic's design is also FAR EASIER to take apart because it doesn't have those magnets to help with balance & add to the sealing structure.

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post #660 of 2743
Thanks man, i appreciate it!

I was thinking about the bearing TR uses on the TY-140, the EHFB, wich supposedly is a HDB, so i thjough it's similar to the Cougar/Power Logic fans?
Is it known who the OEM/ODM is for Noctua and the Thermalright TY-14X series? Does Coolink actually make fans for Noctua too or just the heatsinks?

Again, thank you smile.gif
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