12-Way 120mm Fan Roundup

jmke · 31st March 2006, 14:29

# Aerocool Turbine 1000
# Aerocool Turbine 2000
# Aerocool Turbine 3000
# Enermax Warp
# ichbinleise 12/1000
# Papst 4412 F/2GLL
# Papst 4412 F/2GL
# Papst 4412 F/2GL + NMT-2
# Revoltec AirGuard
# Scythe S-Flex SFF21D
# Scythe S-Flex SFF21E
# Yate Loon D12SL-12

easypanic · 31st March 2006, 14:30

copycats

jmke · 31st March 2006, 14:36

they used this device for dBA measurements: http://www.atp-messtechnik.de/messte...-264-plus.html

€2000+ - range of 15-140dB.

They state they are not in a special noise room, but still the noise readings list <20dBA values.. wtf?

Quote:

Originally posted by easypanic
copycats

reading results from tables is not too user friendly in my humble opinion

jmke · 31st March 2006, 14:43

no mention of ambient noise and they measured 11dBA for the Scythe "D"... uh?

Sidney · 31st March 2006, 14:50

Can't believe a single data point from them.

31st March 2006, 15:03

quite good actually

they explained a few things very well and the maintenance tips are good as well

Their dba readings are adjusted to the human hearing capabilities, that might explain the results from Scythe. They tried to do something like AC does with the rating in sone.

Biggest issue is, the test did not allow large discrepancies because the airflow in the case was too good and the Northwood is not taxing enough.

Still, Scythe seemed to gain the critical knowlege from their cooperation with AC that fans matter a lot. If they start supplying the the E version of their flex fan with their coolers, the competition has to be very affraid.

jmke · 31st March 2006, 15:18

comparo time!

Sidney · 31st March 2006, 15:21

More nonsense from Rutar.

http://www.eie.fceia.unr.edu.ar/~acu...e/soundlev.htm

Unless that guy lives in a broadcasting studio.

31st March 2006, 16:42

The sound pressure level has the advantage of being an objective yet a handy measure of sound intensity, but it has the drawback that it is far from being an accurate measure of what is actually perceived. This is because the ear's sensitivity is strongly dependent on frequency. Indeed, whearas a sound of 1 kHz and 0 dB is already audible, you need to raise up to 37 dB to be able to hear a tone of 100 Hz. The same holds for sounds above 16 kHz.

directly from the link, they did an adjustment according to the frequency of the sound (and unless you can read German, it might have gone missing in the translation)

both the madshrimps and the other results are correct, both times a clear description is given how they were achieved

jmke · 31st March 2006, 17:16

there are still some things not quite right, if you look at the Turbine 1000 vs Papst at 12V

*in their test the Turbine cools better than Papst, is louder than Papst and spins slower.
* in my test the Aerocool cools less than Papst, makes less noise and spins slower.

31st March 2006, 14:29	#1
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,021	12-Way 120mm Fan Roundup # Aerocool Turbine 1000 # Aerocool Turbine 2000 # Aerocool Turbine 3000 # Enermax Warp # ichbinleise 12/1000 # Papst 4412 F/2GLL # Papst 4412 F/2GL # Papst 4412 F/2GL + NMT-2 # Revoltec AirGuard # Scythe S-Flex SFF21D # Scythe S-Flex SFF21E # Yate Loon D12SL-12 __________________

31st March 2006, 14:30	#2
easypanic Member Join Date: Mar 2003 Posts: 1,823	copycats __________________ \|^^^^^^^^^^^^^^^^^^\\|\|____ \|....The BEER TRUCK.... \|\|\|\|'""\|""°\_,__ \|___Just for You___l\|\|__\|__\|___\|) _____\| \|(@)(@)""""""""""""\|(@)(@)**\|(@)\|

31st March 2006, 14:43	#4
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,021	no mention of ambient noise and they measured 11dBA for the Scythe "D"... uh? __________________

31st March 2006, 14:50	#5
Sidney Member Join Date: Mar 2004 Posts: 15,738	Can't believe a single data point from them. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

31st March 2006, 15:18	#7
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,021	comparo time! __________________

31st March 2006, 15:03	#6
Rutar Posts: n/a	quite good actually they explained a few things very well and the maintenance tips are good as well Their dba readings are adjusted to the human hearing capabilities, that might explain the results from Scythe. They tried to do something like AC does with the rating in sone. Biggest issue is, the test did not allow large discrepancies because the airflow in the case was too good and the Northwood is not taxing enough. Still, Scythe seemed to gain the critical knowlege from their cooperation with AC that fans matter a lot. If they start supplying the the E version of their flex fan with their coolers, the competition has to be very affraid.

31st March 2006, 15:21	#8
Sidney Member Join Date: Mar 2004 Posts: 15,738	More nonsense from Rutar. http://www.eie.fceia.unr.edu.ar/~acu...e/soundlev.htm Unless that guy lives in a broadcasting studio. __________________ lazyman Opteron 165 (2) @2.85 1.42 vcore AMD Stock HSF + Chill Vent II

31st March 2006, 16:42	#9
Rutar Posts: n/a	The sound pressure level has the advantage of being an objective yet a handy measure of sound intensity, but it has the drawback that it is far from being an accurate measure of what is actually perceived. This is because the ear's sensitivity is strongly dependent on frequency. Indeed, whearas a sound of 1 kHz and 0 dB is already audible, you need to raise up to 37 dB to be able to hear a tone of 100 Hz. The same holds for sounds above 16 kHz. directly from the link, they did an adjustment according to the frequency of the sound (and unless you can read German, it might have gone missing in the translation) both the madshrimps and the other results are correct, both times a clear description is given how they were achieved

31st March 2006, 17:16	#10
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,021	there are still some things not quite right, if you look at the Turbine 1000 vs Papst at 12V in their test the Turbine cools better than Papst, is louder than Papst and spins slower. in my test the Aerocool cools less than Papst, makes less noise and spins slower. __________________

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