Which 12cm fans suitable for heatercore?
 

I am ready to get 2 12cm fans for my heatercore but have no idea. Noise level is one of my consideration.
Please give some suggestions to me. Thanks.

I would check this thread out: http://forums.silentpcreview.com/viewtopic.php?t=16393

NoiseBlocker SX-2
Yate-Loon / Tricod Science / Nexus (all OEM clones of the same base fan - being the SPDL 1225S (also referred to as the 1225L by ThermalTake but not sold separately by TT).
AcoustiFan DustProof's

Those would be the best of the ultra-low noise focused fans.

Moving up in noise levels you get to the Panaflo L1A's, the Papst's, and the Sanyo-Denki's, which are the best of the moderate-power moderate-noise fans.

Perhaps a little easier to answer your question if you give an idea of a fan that you presently have which you consider is acceptable in noise level to you.

"NoiseBlocker XS-2"

I get nothing on google. Can these be bought somewhere?

SX2, not XS2. I wrote the latter initially due to sleep-deprivation induced dyslexia, but edited my post.

LOL, I was way to quick to copy an paste! I still come up short though. I found the thing on what I think is French sites.

I accpet mix. about 41dBA. 25mm thickness fan is recommanded.
The heatercore from DD is thick that I guess it needs a fan with high air pressure.

Homepage => http://www.noiseblocker.de/

38mm thick fans tend to give a little more pressure then 25mm (at least according to the spec sheets, I haven't tested myself).

but then they also make a great deal of noise XD

Also which heater core (I would guess it's one that's about 2" thick, but you're in HK and I don't know what's available to you). Are you using a single fan with a shroud? 120mm fan, right? A notion of what you were cooling (so we get an idea of how much heat you're trying to shed from the rad) would be useful, too.
My experience is that (at least low noise) fans are more effective at pulling through a heatercore than pushing - and that if a single fan doesn't produce enough pressure, stacking two fans (with a spacer between) on the "pull" side works better (in the sense of lower noise for the same performance) than a push/pull setup.
Also - Cathar may have a better sense of what fans are available to you than those of us in the States or Europe...

I have the AC sunon 2123s on my BIP2. They are very quiet 38mm thick fans. Ideal for thick heater cores I would think.

But aren't those 220VAC fans running on 115V? If HK is 220, 115 might be hard to come by...(?)

Oops. I didn't catch that. Where is the HK? They work well stateside anyway.


Edit: oh, Hong Kong.

General consensus on spcr seems to be that this is not a quiet fan and that is has high vibration and a ticking noise.

http://forums.silentpcreview.com/viewtopic.php?t=13749

http://forums.silentpcreview.com/vie...eblocker#18168

The heatercore was ordered from DD. Can I have a acceptable performance with 2 Papst 4414F fans on the "pull" side?

Is a single Nexus 120mm fan going be be able to pull any significant amount of air through a 2" heatercore? By significant, I mean enough to cool a standard CPU+pump heatload.

I think I remember you saying that this is one of the primary reasons that the PA160 is so much better. You can't simply downscale the fan speed (and thus the mm Hg) used on a heatercore past a certain point to get real quietness. You get to the point where the fan is moving but the air is simply being stirred on one side of the heatercore.

My simulations suggest 10fpi, 50mm thick cores(DD heater-cores) would give similiar results to 14fpi,22.5mm thick cores(eg PA160).

http://www.jr001b4751.pwp.blueyonder.co.uk/oc1.jpg

I don't have simulations, but I do have a couple of systems cooled by heatercores/nexxus fans. Both show very reasonable diode temps (and one of the two is overclocked).
However, I get the same temps as a single nexxus pulling through a heatercore by stacking two undervolted nexxus fans - and it's perceptably quieter (actually, goes from "audible" to "not audible" for me). (fans have a hollowed out fan body between 'em to prevent interference).
Also - I'm pretty careful about internal case air flow, all grills cut open and replaced by wire guards, front bezel unrestrictive, internal wiring fastened out of the way, etc., etc. ...

No more then any other equivilent RPM fan.

Two 7V nexus 120mm fans in series? I would never have thought of that one. Pics?

How about put a Panaflo FBA-12G12M on "pull" side? 35.5dbA with 86.5CFM looks good!

Sure - next time I have things enough apart that a pic might make sense - until then, just imagine three fans stacked, one on top of each other - only the center one doesn't have anything inside (but from the side it just looks like three fans).
Both setups are with coolingworks shrouds and montego heatercores and look tidy enough to be boring (except for the black stripe between the orange - haven't had a nexxus fan fail, so no orange fans to sacrifice.
I've done this with several kinds of fans, but never with ones powerful enough to be considered "normal" :) so I expect it's simply something abut low powered axial fans stalling against resistance and not some general way to get better noise/cooling out of an arbitrary (matched) set of fans...

Absolutely! My thread at SPCR details exactly that, and I run the fan at 5-6V. My fan is the Yate Loon SL, so that should equate to a Nexus at 7-8V. Here's a teaser:
http://img.photobucket.com/albums/v4...C-side-640.jpg

I use 3 papst 4412, I cant use them@5 volt :-(, the differance on the CPU is 1°C if I use them @ 12 volt
(Im testing pasive mode today, so far Im @ 46°C on the diod, but still rising :( )

Nice build, HammerSandwich. I just finished browsing your worklog over at SPCR and totally approve.

The temperature stopped to rise @ 53°C, equals I can watch a movie with no fans but no game. And if I get a fan falure there is no problem.
The problem is pressure and cavitation. The pressure in the watertank is to high (the water wants to go out throw the fillingport). The water temperature (36.9°C) makes the pressure booling point to rise and I get almost constant cavitaiton in the pump (Hydor L30) = noise and less lifetime on the pump.
The differance between no fans on the rad and the fans @ 7 volt is virutal none in sound, however the diffreance in water temperatur is 11 °C. I only get 1-1,5 less temperaure if I run the fans @12 Volt.
Sorry If I went a bit of topic.

EDIT: horrasontaly the delta T = 17°C (amb/water) after 3 h with burn in,

Thanks, Brian! Hearing that does my ego good...