Go Back   Pro/Forums > ProCooling Technical Discussions > General Liquid/Water Cooling Discussion
Password
Register FAQ Members List Calendar Chat

General Liquid/Water Cooling Discussion For discussion about Full Cooling System kits, or general cooling topics. Keep specific cooling items like pumps, radiators, etc... in their specific forums.

Reply
Thread Tools
Unread 01-28-2005, 01:58 AM   #26
Etacovda
Cooling Savant
 
Join Date: Feb 2004
Location: Dunedin NZ
Posts: 735
Default

DrCR - thanks for a very well made post; havent been looking that hard, to be honest - spent all of 1 hour at spcr.com in total, and not looking at fans; had heard globe being thrown around and had found a reasonably cheap stockist
__________________
Hypocritical Signature I tried to delete: Procooling: where scientific principles are ignored because big corporations are immune to mistakes and oversights.
Etacovda is offline   Reply With Quote
Unread 01-28-2005, 06:10 AM   #27
ferdb
Cooling Neophyte
 
Join Date: Sep 2004
Location: texas
Posts: 68
Default

DrCR's post covers pretty much everything on the current state of the art on fans. Thanks again for his patience and persistence in compiling all that stuff and goading the threads into producing good info.
Just to summarize my own experiences of testing a LOT of 120mm fans. I put the best ones on a BIP II radiator and measured airflow vs rpm and relative noise vs rpm. Undervolting is assumed, and was adjusted to give best performance.

1) There is no quiet 120x38 mm DC fan. They all have considerable motor noise and moderate bearing noise.

2) In the 120x25mm fan category the Nexus 120 is the best. A close second goes to the Globe S1202512L-3M and the SilentX 120. Both have slightly more motor noise than the Nexus. The Globe can push more CFM at max voltage. The Silentx has the dubious distinction of being one of the most expensive fans on the market (4X the Globe) and their claimed noise figures are blatant marketing lies. However it is comparable to the Globe in airflow vs noise. It appears to be a remarked Adda fan.

3) If you need more airflow than the Nexus 120 will provide at 12V you are not going to get a quiet fan as the airflow noise becomes dominant. Get a Globe and adjust to your needs.

4) The 120x25mm fans CFM drops off considerably more than the 120x38mm fans when dealing with the backpressure of a radiator. However they STILL end up having a better CFM vs Noise ratio than the available 120x38mm fans.

Bottom line - If you want the quietest system buy a Nexus 120. If you're not fanatical about the noise but just want quiet, get the cheaper Globe which has an upper CFM around 50% more than the Nexus. In all cases, adjust the fan voltage to achieve the results you want.

For the Fanatics - you can get the absolute best CFM vs noise out of a Sunon A2123 230VAC fan undervolted, but you have to deal with the AC end of it. See this thread
http://forums.silentpcreview.com/viewtopic.php?t=17002
ferdb is offline   Reply With Quote
Unread 01-28-2005, 09:23 AM   #28
BillA
CoolingWorks Tech Guy
Formerly "Unregistered"
 
Join Date: Dec 2000
Location: Posts: 2,371.493,106
Posts: 4,440
Default

hats off to spcr and crew, a truly fine compilation
pH, add to your linkage ?
BillA is offline   Reply With Quote
Unread 01-28-2005, 09:55 AM   #29
DrCR
Cooling Savant
 
Join Date: Jul 2004
Location: Luyten 789-6
Posts: 108
Default

Yeah, the SPCR community is great. But of course, it has its knack just like everyone else. For example, the watercooling section isn't exactly spectacular (there's a core with know-how there, just not a lot of action and in general not sufficiently extreme for my taste. ), and that's why I come here, to the watercooling site. But at the same time, less so in recent times due to an apparently growing quiet computing fad, I sometimes crack-up over the "quiet" computing advise recommended here.

What's pulling for SPCR is that you know where the info is coming from. What one site calls a "quiet" PSU, SPCR could totally trash. One site may glorify a nice shiny new case, SPCR may give it a no go due to its poor disposition with regard to airflow at low CFMs.

So if I’m looking for quiet (or the coveted silent) related info, I go there. Otherwise, well, it’s obvious I’m not posting over there at this moment lol.

Quote:
Originally Posted by unregistered
hats off to spcr and crew, a truly fine compilation
pH, add to your linkage ?
Linkage would be good indeed. I'm not too sure about a sticky though. While there, again, seems to be a quiet computing fad nowadays, I think we all would agree the core focus here is different than SPCR, sometimes drastically, and hence, what's a sure thing at SPCR could totally tick a guy from here. I can just imaging a delta screamer user getting in a shipment of Nexus fans and wondering where his room air-circulator went (or thinking his computer is wasted and isn’t turning on lol).

DrCR

________

Last edited by DrCR; 01-28-2005 at 10:03 AM.
DrCR is offline   Reply With Quote
Unread 01-28-2005, 10:13 AM   #30
BillA
CoolingWorks Tech Guy
Formerly "Unregistered"
 
Join Date: Dec 2000
Location: Posts: 2,371.493,106
Posts: 4,440
Default

for sure, but it is quite enjoyable to find a site where info is sought, evaluated, and respected
neglected often is the most basic: a definition of terms
the number of 'silent' vs. 'quiet' arguments I've had is appalling, a morass of subjectivism
many of these words can only convey a sense, when one is attempting to quantify
VERY difficult to find a 'solution'
BillA is offline   Reply With Quote
Unread 01-28-2005, 04:34 PM   #31
DrCR
Cooling Savant
 
Join Date: Jul 2004
Location: Luyten 789-6
Posts: 108
Default

morass. hey, that's some nice vocab.

Yeah, before everyone had to refer to a standard reference, and for a long time it was a good Japanese (not Chinese) sample of the 80mm Panaflo L1A (often called the Japanaflo on the SPCR forums). But if the poor newguy had never heard one, he was still potentially in another ballpark. (On the side, a Japanaflo's noise characteristics are way different i.e. superior than its 120mm sibling)

Now it's starting to become a science. Just an example, from the presently latest post on the SPCR mainpage:
Jordan's Quiet DampTek'd Home Theater PC

I'll go ahead and include this here, even though it's mentioned in the above thread, just so no one misses it perchance.
Quote:
How to Listen and Compare

The MP3 recordings were made with a high resolution lab quality digital recording system. The microphone was 3" from the front center panel of the system. The ambient room noise during all recordings was ~18 dBA.

To set the volume to a realistic level (similar to the original), try playing this reference file, Nexus 92mm case fan @ 5V (17 dBA/1m), and setting the volume so that it is barely audible. Then don't reset the volume and play the other sound files. Of course, tone controls or other effects should all be turned off or set to neutral. For full details on how to calibrate your sound system to get the most valid listening comparison, please see the yellow text box entitled Listen to the Fans on page four of the article SPCR's Test / Sound Lab: A Short Tour.
This is solid stuff, no doubting that.

DrCR

________
DrCR is offline   Reply With Quote
Unread 01-28-2005, 05:09 PM   #32
Ruiner
Cooling Savant
 
Join Date: May 2003
Location: New Smyrna, FL
Posts: 258
Default

Another pitch for that sunon 2123....it's a steal at ten bucks.

Thanks for that tip, Ferd.
Ruiner is offline   Reply With Quote
Unread 01-29-2005, 10:45 AM   #33
surge
Cooling Neophyte
 
surge's Avatar
 
Join Date: Mar 2003
Location: UK
Posts: 15
Default update

OK just replace the Papsts with 2 Panaflo L1As at 9 volts (lowest voltage my Nexus Fan Controller will give with fans of this power rating). All I hear now is the sound of air moving
Apart from..... the Neo2 Platinum NF3 chipset fan
But since I am going to replace this board soon with a DFI NF4 Ultra-D I'll live with it.
Looks like the postion of the NF4 chip on the DFI board means it will be a ***** to fit a w/b to.....
surge is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 10:37 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
(C) 2005 ProCooling.com
If we in some way offend you, insult you or your people, screw your mom, beat up your dad, or poop on your porch... we're sorry... we were probably really drunk...
Oh and dont steal our content bitches! Don't give us a reason to pee in your open car window this summer...