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TESTING
Before thermal testing, we took some basic physical measurements.
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Scythe Kabuto & Zipang 2:
Approximate Physical Measurements
|
| Property |
Kabuto |
Zipang 2 |
|
Weight
|
600 g
730 g with fan and clips
750 g with fan, clips and mounting hardware |
590 g
730 g with fan and clips
750 g with fan, clips and mounting hardware |
|
# of fins
|
53 |
68 |
|
Fin thickness
|
0.31 mm |
0.31 mm |
|
Fin spacing
|
1.94 mm |
1.94 mm |
|
Approx. area of main fin stack
|
6042 cm2 |
6568 cm2 |
|
Vertical Clearance
|
60 mm (motherboard PCB to heatsink's bottom fin) |
44 mm (motherboard PCB to heatsink's bottom fin) |
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Comparison: Approximate Fin Thickness & Spacing
|
|
Heatsink
|
Fin Thickness
|
Fin Spacing
|
|
Scythe Ninja 2
|
0.39 mm
|
3.68 mm
|
|
Thermalright HR-01 Plus
|
0.45 mm
|
3.15 mm
|
|
Noctua NH-U12P
|
0.44 mm
|
2.63 mm
|
|
Noctua NH-C12P
|
0.47 mm
|
2.54 mm
|
|
Thermolab Baram
|
0.44 mm
|
2.52 mm
|
|
Prolimatech Megahalems
|
0.50 mm
|
2.00 mm
|
|
Xigmatek HDT-S1283
|
0.33 mm
|
1.96 mm
|
|
Scythe Zipang 2
|
0.31 mm
|
1.94 mm
|
|
Scythe Kabuto
|
0.31 mm
|
1.94 mm
|
|
Scythe Mugen-2
|
0.31 mm
|
1.89 mm
|
|
Zerotherm Zen FZ120
|
0.37 mm
|
1.80 mm
|
|
Zalman CNPS10X Extreme
|
0.42 mm
|
1.50 mm
|
|
Thermalright Ultra-120
|
0.45 mm
|
1.42 mm
|
Testing was done according to our
unique heatsink testing methodology, and the included fan was profiled
using our standard fan testing
methodology. A quick summary of the components, tools, and procedures
follows below.
Key Components in Heatsink Test Platform
- Intel
Pentium D 950 Presler core, C1 stepping. TDP of 95W; under our test
load, it measures 78W including losses in the VRMs.
- Asus P5Q-EM motherboard.
A microATX board with integrated graphics and short solid-state capacitors
around the CPU socket, and a diminutive northbridge heatsink for maximum compatibility.
- Intel
X25-M 80GB 2.5" solid-state drive.
- 1GB
of Corsair XMS2 DDR2 memory. 2 x 512MB PC2-8500.
- FSP Zen 300W
fanless power supply.
- Arctic Silver
Lumière: Special fast-curing thermal interface material, designed
specifically for test labs.
- Nexus 120 fan (part of our standard testing methodology; used when
possible with heatsinks that fit 120x25mm fans)
|
Nexus 120mm fan measurements
|
|
Voltage
|
Noise
|
RPM
|
|
12V
|
16 dBA@1m
|
1100 RPM
|
|
9V
|
13 dBA@1m
|
890 RPM
|
|
7V
|
12 dBA@1m
|
720 RPM
|
|
5V
|
11 dBA@1m
|
530 RPM
|
Measurement and Analysis Tools
- Seasonic
Power Angel for measuring AC power at the wall to ensure that the
heat output remains consistent.
- Custom-built, four-channel variable DC power supply, used to regulate
the fan speed during the test.
- PC-based spectrum analyzer:
SpectraPlus with ACO Pacific mic and M-Audio digital
audio interfaces.
- Anechoic chamber
with ambient level of 11 dBA or lower
- Various other tools for testing fans, as documented in our
standard fan testing methodology.
- SpeedFan, used to monitor the on-chip thermal sensor. This sensor is not
calibrated, so results are not universally applicable.
- CPUBurn
P6, used to stress the CPU heavily, generating more heat than most
real applications. Two instances are used to ensure that both cores are stressed.
- Throttlewatch
2.01, used to monitor the throttling feature of the CPU to determine
when overheating occurs.
Load testing was accomplished using CPUBurn to stress the processor, and the
graph function in SpeedFan was used to make sure that the load temperature was
stable for at least ten minutes. The stock fan was tested at various voltages
to represent a good cross-section of its airflow and noise performance.
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