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          | 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 | 
  
    | AVC | Z7U7414001 (stock AM2) | high | 17.0 | 63.0 | 
  
    | Noctua | NH-U12 |  | 17.5 | 45.4 | 
  
    | Gigabyte | GH-PCU23-VE | high | 17.5 | 65.6 | 
  
    | Gigabyte | G-Power Pro | high | 18.6 | 71.9 | 
  
    | Noctua | NH-U9 |  | 18.8 | 58.4 | 
  
    | Apack | Zerotherm BTF90 |  | 20.5 | 52.1 | 
  
    | Coolermaster | Hyper6 | high | 20.5 | 54.7 | 
  
    | Apack | Zerotherm BTF80 |  | 21.3 | 51.9 | 
  
    | Thermaltake | Venus 12 | high | 21.7 | 68.1 | 
  
    | Cooljag | SFO-Q | high | 22.2 | 60.6 | 
  
    | ASUS | Starice | high | 22.8 | 67.4 | 
  
    | Zalman | CNPS9500 AM2 | high | 23.0 | 53.2 | 
  
    | Arctic Cooling | Freezer 64 Pro |  | 23.2 | 50.9 | 
  
    | Coolermaster | Aquagate Mini | high | 23.2 | 59.2 | 
  
    | Thermaltake | Polo 735 | high | 23.4 | 68.0 | 
  
    | Cooljag | SFO-H | high | 23.6 | 60.6 | 
  
    | Alpha | PAL-8150 |  | 23.7 | 58.9 | 
  
    | Zalman | CNPS9500 LED | high | 23.8 | 50.3 | 
  
    | Verax | Helado |  | 24.3 | 36.3 | 
  
    | AVC | Z7U3301001 (stock 939) | high | 24.6 | 59.9 | 
  
    | Zalman | CNPS8000 | high | 24.8 | 57.4 | 
  
    | Gigabyte | 3D Cooler-Ultra | high | 24.8 | 63.0 | 
  
    | OCZ | Tempest |  | 26.0 | 51.6 | 
  
    | Scythe | Shogun | high | 26.0 | 45.9 | 
  
    | EKL | V8 | high | 26.3 | 57.5 | 
  
    | Thermalfly | F1-IACSHA | high | 26.6 | 60.4 | 
  
    | Zalman | FS-C77 |  | 26.7 | 56.5 | 
  
    | Gigabyte | 3D Rocket-Pro | high | 26.9 | 56.7 | 
  
    | Zalman | CNPS7700-Cu | high | 27.0 | 50.7 | 
  
    | Gigabyte | 3D Cooler-Pro | high | 27.0 | 62.5 | 
  
    | nPowerTek | NPH-Big K8 |  | 27.8 | 54.0 | 
  
    | Spire | SP601B3 |  | 28.3 | 48.9 | 
  
    | Ajigo | MF064-074 | high | 28.8 | 60.3 | 
  
    | Gigabyte | 3D-Rocket |  | 28.9 | 50.7 | 
  
    | Vantec | Mach1 | high | 29.2 | 56.9 | 
  
    | AVC | Z7U7414001 (stock AM2) | low | 29.6 | 48.1 | 
  
    | CoolJag | SFO-D(18SC) |  | 29.6 | 64.0 | 
  
    | Antazone | AS-C1000 |  | 30.2 | 57.6 | 
  
    | Arctic Cooling | Alpine 64 |  | 30.5 | 43.9 | 
  
    | Zalman | CNPS7000A-Cu | high | 30.3 | 45.2 | 
  
    | Dynatron | SK-V24 |  | 30.3 | 56.4 | 
  
    | Verax | Quattro 1 | high | 30.7 | 55.4 | 
  
    | Zalman | CNPS7000-Cu | high | 31.0 | 45.2 | 
  
    | Coolermaster | Hyper48 |  | 31.7 | 43.6 | 
  
    | Thermalfly | F1-IACSHA | low | 31.9 | 35.4 | 
  
    | Scythe | Kama SCKK1000 |  | 31.9 | 47.5 | 
  
    | Scythe | Samurai SCSM1000 | high | 32.1 | 51.6 | 
  
    | Zalman | CNPS7000B-CU | high | 32.3 | 44.9 | 
  
    | Thermaltake | Silentboost K8 |  | 32.3 | 49.7 | 
  
    | Jetart | JAX801 |  | 33.2 | 53.5 | 
  
    | Dynatron | A22 |  | 34.5 | 44.5 | 
  
    | nPowertek | NPH K8-1 |  | 34.6 | 52.2 | 
  
    | Ajigo | MF043-044 (stock 754) |  | 35.0 | 45.4 | 
  
    | Arctic Cooling | Silencer 64 Ultra TC |  | 37.5 | 55.5 | 
  
    | Gigabyte | NeonCooler 8-BL |  | 37.7 | 42.0 | 
  
    | Titan | TTC-K8ATB/825/SC |  | 38.7 | 63.1 | 
  
    | Evercool | K802-715 |  | 42.1 | 51.5 | 
  
    | Spire | SP741B3 |  | 43.2 | 45.6 | 
  
    | Evercool | Magic Cooler |  | 46.6 | 55.5 | 
  
    | ASUS | Starice | low | 92.4+ | 34.4 | 
  
    |  |  |  | 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. | 
 
With a 125W heat load applied 
by the AMD 
K8 version      of the FrostyTech synthetic 
thermal test platform, the Thermalfly 
F1-IACSHA yields a rise above ambient temperature of 26.6°C, and 60.4dBA noise 
with its PWM fan spinning 
at full speed. When the fan speed is adjusted from 3500RPM down 
to    a quieter 1300RPM, 
the heatsink posts a 31.9°C rise over ambient temperature result, with  a significantly quieter 
35.4dBA!
Clearly, the Thermalfly F1-IACSHA is better suited 
as a low noise heatsink on the K8 AMD platform, given there is only a difference 
of 5°C between its highest and lowest fan speeds, yet a significant drop in 
noise output.
The 
results for this heatsink on the Intel LGA775 version of 
FrostyTech's synthetic thermal test platform are up next. 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.