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Akasa Evo Blue AK-922 Heatsink Review
Akasa Evo Blue AK-922 Heatsink Review
  73%   
Abstract: The AK-922 'Evo Blue' features no less than six copper heat pipes, a very thick copper base, 52 thin aluminum fins, a small extruded aluminum heatsink, and four strategically placed blue LEDs..

 Company link  Category  Published  Author 
Akasa   Cooling / Heatsinks   Jun 19, 2007   Max Page  
Home > Reviews > Page Title: Intel 775 Heatsink Temperature Comparisons

FrostyTech Mk.II Synthetic Thermal Heatsink Test Results
Intel Pentium D / Extreme Edition & Quad Core class heatsinks tested at 150W
Intel Core 2 Duo / Pentium 4 / Celeron class heatsinks tested at 85W

Results based on readings from a 30x30mm copper interface die with 150W and 85W heat loads applied on the LGA775 version of the Mk.II Test Platform. Temperature results listed for each heatsink were calculated by determining the rise over ambient temperatures at time of test. Information on Frostytech's test methodology is available here.
Socket 775 compatible CPU heatsinks
Manufacturer: Model No.: Fan Speed: 150W
Thermal Test* (°C)
85W
Thermal Test (°C)
Noise Level (dBA)

Thermalright Ultra 120 17.8 10.6 53.7
Zalman CNPS9700 LED high 19.0 10.4

56.5

Thermalright Ultra-90 high 19.6 13.0 56.2
Enzotech Ultra-X high 20.0 8.5 59.1
Apack Zerotherm BTF90 21.8 12.7 52.1
Apack Zerotherm BTF80 22.8 13.9 51.9
Cooljag Falcon 92-AL high 23.2 14.2 52.1
Scythe Mine Rev. B 23.6 15.0 36.8
Cooljag Falcon 92-Cu high 23.6 14.8 52.8
Akasa AK-920 high 24.3 14.1 52.9
Asus Arctic Square high 24.9 14.9 44.9
Akasa AK-922 (EVObue) high 25.5 15.4 60.3
Thermalfly F1-IACSHA high 29.0 18.3 60.4
Thermalfly I75DUB high 29.5

16.8

68.5
Zalman CNPS9500 AT 29.6 17.3 53.3
Alpha Novatech PRE9060M92P high 29.9 18.5 51.5
Scythe Kama Cross 30.0 18.8 40.0
Akasa AK-961 30.0 18.7

60.7

Rosewill RCX-Z2-EX high 30.1 18.7 45.9
nPowertek NPH-775-1 30.1 18.8 50.1
Sunon Waturbo 30.6 18.3 57.5
Apack CF800 high 31.4 20.7 48.4
Thermaltake Jungle512 high 31.6 20.4 60.8
Xigmatek AIO-S80DP high 32.4 21.4 55.0
Scythe Katana II 32.5 18.6 37.9
Rosewill RCX-Z2

32.6

19.3 59.9
Zalman CNPS7700-Cu high 32.9 19.7 50.7
Apack CF900 high 32.9 20.3 48.3
Evercool PT02-9232CP 33.3 19.9 63.3
Zalman CNPS7700-Cu LED high 33.5 20.6 49.8
Intel Stock Pentium D high 33.8 20.7 47.5
nPowerTek SF775-2 high 34.7 21.1 64.6
Akasa AK-960E 36.1 21.4 56.3
Thermalfly I75DUH 37.8 22.8 48.7
Cooljag OAK-H high 38.5 22.9 55.7
Cooljag OAK-H2 high 38.6 24.1 55.6
LS Cable SHS-T700 38.7 22.8 48.5
Akasa AK-922 (EVObue) low 44.8 27.0 42.1
Cooljag OAK-H low 95.3 54.5 29.5
150W
Thermal Test (°C)
85W
Thermal Test (°C)
Noise Level (dBA)
*Heatsinks are ranked according to the 150W thermal test results column (rise over ambient temp.). Low temperatures with low noise levels are considered best. For reference heatsinks with variable-speed fans, only the high speed (12V) fan test result is included in the comparison sheet; more detailed results reside in each specific heatsink review.

Intel processors vary widely in heat output between single and multi-core processors, so Frostytech relies upon on two different thermal values to represent the upper limits of existing Intel single and multi-core CPU families. First off, a 150W heat load was applied by the Intel LGA775 version of FrostyTech's synthetic thermal test platform to the Akasa Evo Blue AK-922 heatsink. This yielded a rise above ambient temperature of 25.5°C, with 60.3dBA noise. That's a good result, but not low enough to be considered top of the line... and 60.3 dBA is a somewhat loud to live with.

When the 92mm PWM fan speed was dropped down to about 1200RPM, temperatures rose to 44.8°C over ambient, while noise levels fell down to a much more reasonable 42.1 dBA. When faced with a 150W heat load, Akasa's Evo Blue AK-922 heatsink handles it well, so long as air flow is sufficient.

The Akasa Evo Blue AK-922 heatsink was next tested with an 85W heat load. In this case the heatsink maintained a good 15.4°C temperature over ambient at full fan speed. As fan speed was reduced to low noise mode, the heatsink reacted in a predictable manner - the synthetic CPU die temperatures rose to 27.0°C.

Clearly as we can see from the synthetic thermal test results here, the Akasa Evo Blue AK-922 heatsink is only really able to shine when its fan is loudly spinning away at full RPM. As the volume of airflow passing through its 52 aluminum fins decreases, the heatsink quickly looses effectiveness and the plastic fan shroud starts trapping the heat in. It may look nice, but we're left wondering if it would be better ditching the blue LEDs and the fan shroud entirely so that Akasa's Evo Blue heatsink could potentially operate with a quieter fan. As it stands, the AK-922 is only worthwhile when going at full tilt, and then it is just too loud for modern day computer users to accept.

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- Akasa AK-960E Socket 775 Heatsink Review
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- Alpha Novatech PRE9060M92P Socket 775 Core 2 Duo Heatsink Review
- Zalman CNPS7700-Cu LED Low Noise Heatsink Review
- Zalman CNPS9700 LED Low Noise Heatsink Review
- Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review



 Previous Page °
Heat Sink Review Index  

Table of Contents:

 1:  Akasa Evo Blue AK-922 Heatsink Review
 2:  360° View - Akasa Evo Blue AK-922 Heatsink
 3:  Acoustic Comparisons and Base Surface Quality
 4:  AMD K8 Heatsink Temperature Comparisons
 5: — Intel 775 Heatsink Temperature Comparisons

List all Akasa heat sinks that Frostytech tested?

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