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Mil-Spec Aerospace Fan on Scythe Orochi Heatsink - Big just got bigger!
Mil-Spec Aerospace Fan on Scythe Orochi Heatsink - Big just got bigger!
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Abstract: In this article Frostytech is going to have some fun with the Orochi and conduct a little experiment with the help of one very powerful mil-spec IMC Magnetics fan.

 Manufacturer  Category  Published  Author 
Scythe   Cooling / Heatsinks   Mar 10, 2008   Max Page  

Home > Reviews > Page: Aerospace fan on a CPU Heatsink?

For starters, the rig was ear splitting loud: 87.4dBA. Temperatures fell dramatically, but it quickly became clear the Scythe Orochi heatsink is designed for substantially less airflow. In spite of the volume of air the IMC Magnetics fan was dumping into the aluminum fins of the Orochi every minute, it didn't linearly improve temperatures to par with ambient.

On the 150W Intel test, we saw a rise above ambient of 16.3°C, the 125W AMD test held firm at 14.5°C over ambient. Both desirable results, and both evenly matched by the Xigmatek HDT-S1283 which runs 36.7 dBA quieter! The AMD and Intel synthetic thermal test results charts are shown below, limited to the current 10 best heatsinks. For reference, the stock Scythe Orochi heatsink test results are also included (noted by 'stock fan').

FrostyTech Mk.II Synthetic Thermal Heatsink Test Results
AMD Athlon64 / FX / X2 & Sempron class heatsinks
Results based on readings from a 38x38mm copper interface die with 125W heat load on the K8 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 939/940/754 & AM2 compatible CPU heatsinks
manufacturer: model no.: *fan speed: 125w thermal test (°c) noise level (dba)

Thermalright Ultra-120 12.4 53.7
Xigmatek HDT-S1283 high 14.2 50.7
Scythe Orochi SCORC-1000 IMC Magnetics FAN 14.5 87.4
Coolink Silentator high 15.2 41.2
Scythe Mugen 15.3 46.0
Thermalright Ultra 120 Extreme 15.5 44.5
Xigmatek HDT-S1283 low 15.6 35.0
Xigmatek HDT-S983 high 15.9 52.7
3Rsystem Iceage 120 high 16.1 47.9
Zalman CNPS9700 LED high 16.5 56.5
Scythe Orochi SCORC-1000 Stock FAN 26.2 27.8
125w thermal test (°c) noise level (dba)
*heatsinks are ranked according to the 125w 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.

third best temperature result, highest noise output!

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)

Scythe Orochi SCORC-1000 IMC Magnetics FAN 16.3 9.0 87.4
Xigmatek HDT-S1283 high 16.8 10.7 50.7
Thermalright Ultra 120 17.8 10.6 53.7
3Rsystem Iceage 120 high 18.2 12.1 47.9
Thermalright Ultra 120 Extreme 18.4 11.4 44.5
Coolermaster Hyper 212 19.0 11.8 45.9
Apack Zerotherm BTF92 OC Ed high 19.0 11.2 53.6
Zalman CNPS9700 LED high 19.0 10.4

56.5

Xigmatek HDT-S983 high 19.5 11.8 52.7
Scythe Mugen 19.5 11.4 46.0
Scythe Orochi SCORC-1000 Stock FAN 34.0 20.8 27.8
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.

best temperature result, highest noise output!

so there you have it, bigger doesn't always mean better. We were hoping to get a little closer to ambient temperatures with this massive fan on the Orochi, but that clearly didn't happen. The temperature fell very low, sure, but the noise output was pretty deafening.

Don't worry, we'll pull the IMC Magnetics 6000RPM blower out for another heatsink test in the future... In the mean time, check out Frostytech's full review of the Scythe Orochi heatsink .

Related Articles:

The Top 5 best heatsinks for low noise and low temperature are ranked here. For more reviews on the latest heatsinks and cooling solutions, rely on FrostyTech's inventory of 400+ heatsink reviews. Here are a few other articles that you might enjoy as well.

- Xigmatek HDT-S1283 Exposed Heatpipe Base Heatsink Review
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- Zalman CNPS8700 LED Low Noise Heatsink Review
- Asus Triton 75 Heatsink Review
- Scythe Zipang SCZP-1000 Ultra Low Noise Heatsink Review

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Table of Contents:

 1:  Mil-Spec Aerospace Fan on Scythe Orochi Heatsink - Big just got bigger!
 2: — Aerospace fan on a CPU Heatsink?

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