AMD Phenom II Stock Coolers

Cooling
Viewing page 5 of 7 pages. Previous 1 2 3 4 5 6 7 Next

Stock Fan Measurements: Phenom II AM2+ Stock Cooler

Stock Fan Measurements
Voltage
Speed
SPL @1m
12V
4000 RPM
36 dBA
9V
2860 RPM
26 dBA
8V
2330 RPM
20 dBA
7V
1650 RPM
14 dBA
6V
1350 RPM
12 dBA
Measuring mic positioned 1m at diagonal angle from the intake side of the fan.
Ambient noise level: 11 dBA.

The Phenom II AM2+ stock cooler at full speed produces an extremely whiny, earsplitting 36 dBA@1m thanks to its ridiculous 4000 RPM fan speed. At 9V, the whine lessens allowing air turbulence to contribute to the acoustic profile. At 8V, the noise level becomes bearable, surprisingly smooth, but a little buzzy at times. At 7V it is smooth and quiet, and just barely audible with a SPL of only 14 dBA@1m. At 6V it generates a very faint buzz that is only audible in a dead quiet environment like our anechoic chamber.

Stock Fan Measurements: Phenom II AM3 Stock Cooler

Stock Fan Measurements
Voltage
Speed
SPL @1m
12V idle/load
3280 RPM
30 dBA
9V idle/load
2350 RPM
21~22 dBA
7V load
(~8.4V)
2100 RPM
19~20 dBA
6V load (~7.5V)
1800 RPM
17 dBA
7V idle
1650 RPM
15~16 dBA
5V load
(~6.7V)
1510 RPM
15 dBA
6V idle
1290 RPM
13 dBA
5V idle
910 RPM
11~12 dBA
Measuring mic positioned 1m at diagonal angle from the intake side of the fan.
Ambient noise level: 11 dBA.

The AM3 stock cooler's fan has a lower top speed, but is still very loud at this level, emitting 30 dBA@1m in a mostly whiny and turbulent manner. At 9V it produces an aggressive low-pitched growl. At 7V, it is a little buzzy, but fairly smooth and broadband otherwise. At 6V, there is a slight hum that is just audible.

The fan also appeared to be temperature controlled as during load testing at 7V and below, the fan speed increased even though it was being powered by an external power supply (the RPM sensor wire was connected to a motherboard fan header for real-time fan speed monitoring). When paired with our Athlon II X4 630 test processor, it would not run quieter than 15 dBA@1m on load.


Fan speed measured by SpeedFan. The fan speed increased during load despite the fact we fed it a steady 6V from an external source.



Previous 1 2 3 4 5 6 7 Next

Cooling - Article Index
Help support this site, buy from one of our affiliate retailers!
Search: