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Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
  77%   
Abstract: Thermalfly's I75DUB heatsink has a large 112mm diameter fan that spins at anywhere from 900-3600RPM (as dictated by the cleverly mounted internal thermistor).

 Company link  Category  Published  Author 
Thermalfly   Cooling / Heatsinks   Feb 19, 2007   Max Page  
Home > Reviews > Page Title: Intel LGA775 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

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
Akasa AK-920 high 24.3 14.1 52.9
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
Akasa AK-961 30.0 18.7

60.7

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
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
Thermalfly I75DUB low 47.0 28.5 38.7
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.

The heat output from Intel processors varies widely between single and multi-core processors, so we've settled on two values which represent the upper limit of both existing CPU families.

With a 150W heat load applied by the Intel LGA775 version of FrostyTech's synthetic thermal test platform, the Thermalfly I75DUB heatsink yields a good rise above ambient temperature of 29.5°C, with 68.5dBA noise. When its' fan speed is dropped down to 900RPM, the temperature on the 150W test die rises to an average 47.0°C over ambient. Noise levels fall to a whispery 38.7 dBA.

The Thermalfly I75DUB heatsink was also tested with an 85W heat load, and that resulted in a very nice 16.8°C rise over ambient temperatures. With fan speed once again dialed down, the I75DUB heatsink reacts in a predictable manner and CPU die temperatures hold steady at 28.5°C over ambient.

 On the whole the Thermalfly I75DUB heatsink performs quite well at full fan speed (3600RPM), although we have to admit that the noise levels in this mode are far too audible to accept for any extended length of time.

On the plus side, the embedded thermistor is correctly located to allow the I75DUB to react to its actual temperature, and scale fan speed appropriately. That should allow the Thermalfly I75DUB heatsink to operate in the mid-range between the two noise levels we've quoted previously.

Still, the Thermalfly I75DUB heatsink edges out the stock Intel Pentium D thermal solution by 4°C at full tilt. It's an interesting comparison given both heatsinks are so close in proportion. Overall, this makes the Thermalfly I75DUB heatsink is a good solution, however it lacks the critical capability of cooling better than the stock Intel heatsink, with reduced noise levels.

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For more reviews on the latest heatsinks and cooling solutions, rely on FrostyTech's inventory of 350+ heatsink reviews. Here are a few other articles that you might enjoy as well...

- Xigmatek AIO-S80DP Self-Contained Watercooling Heatsink Review
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- Enzotech Ultra-X Heatsink Review
- Akasa EVO 120 AK-920 Low Noise Heatsink Review
- Akasa AK-960E Socket 775 Heatsink Review
- Apack Zerotherm CF900 Socket 775 Heatsink Review
- 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
- nPowerTek NPH SF775-2 Radial Fin Socket 775 Heatsink Review



 Previous Page °
Heat Sink Review Index  

Table of Contents:

 1:  Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
 2:  360° View - Thermalfly I75DUB Heatsink
 3:  Acoustic Comparisons and Base Surface Quality
 4: — Intel LGA775 Heatsink Temperature Comparisons

List all Thermalfly heat sinks that Frostytech tested?

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