Aerocool Extreme Socket 478 HSF Review

Admin - 2007-01-07 20:40:00 in CPU Cooling
Category: CPU Cooling
Reviewed by: Admin   
Reviewed on: October 13, 2003
Price: $32USD +/-
Having been involved in the North American cooling market for only 2 years, AeroCool has established itself as a major player in this catagory, offering over 17 different heatsink & fan (HSF) packages that cater to varying levels of the "overclocking enthusiast." Today I will be looking at the AeroCool Extreme, one of the two heatsinks from AeroCool that can be used on the socket 478 platform.

  • Heatsink Dimensions: (63 × 70 × 31) mm
  • Heatsink Material: Copper
  • Heatsink Type: Bonding Fin
  • Fan Dimensions: (80 × 80 × 25) mm
  • Bearing: Sleeve
  • Fan Speed: ~2600 RPM (closer to 2700 during testing)
  • Air Flow: 34CFM
  • Unit Weight: 330g
  • Usable on s478 (up to 3.6GHz) and sA (Duron, Athlon (TB), AXP up to 3000+)

  • Nice, Compact Package  Quick Features Label

    All Laid Out
    Closer Look
    Like most other heatsinks, the unit is essentially an 80mm fan on top of a copper heatsink. In the 2 photos below, the fins appear to be pre-sliced and then attached to the base of the copper block (hence the name, "Bonding Fin"). Whether or not this actually results in a detrimental cooling effect remains to be seen.

    The bottom of the heatsink has have a safety sticker at the bottom. While the pre-lapped surface is not a mirror finish like that of the Volcano 7+, it should be more than sufficient for the task. If it becomes necessary, the heatsink can be further lapped in order to achieve that polished look.

    With so many heatsinks that follow the method of "fan on copper", the only real determinant to these heatsinks is the manufacturers' various methods of getting the heat up to the fins, where the fan can exhaust them. Using this premise, this heatsink is expected to perform with results that are similar to other heatsinks that utilize this method. If there is a fan controller available, then it should be similar to the cooling performance gained with the fan at medium setting.

    Since I am testing this on an Intel system, some adjustments were required, mainly the removal of the AMD clip and the installation of the P4 clips. What really bothered me, is the actual installation of the heatsink. The next photo contains an excerpt of the installation instructions.

    Basically, the heatsink is to be placed on top of the CPU, and then the fan (with the clips attached) will be installed on top. The clips are then pressed into the hooks of the retention module. However, the heatsink is significantly smaller than the dimensions of the retention module, and there is no spot in particular where the heatsink would not freely slide over the CPU's thermal-pasted surface. This means the only thing holding the heatsink in place is from the force of the P4 clips when they are installed into the retention hooks. I've tried rotating the heatsink 90 degrees, to see if the other 2 sides would somehow securely fit into parts of the retention module, but to no avail.

    On its own this is not too pressing of an issue, especially if the computer is not moved alot. However, if you're an individual who loves to carry his rig to LAN parties or whatnot, be extremely careful subjecting the heatsink to too many road bumps if the tower is held vertically. The clips themselves are quite easy to move, and this suggests that there is not alot of force from the clips to hold the heatsink down.
    So let's get going on the good parts: What type of performance will this HSF give you.

    Testing Setup
    Intel Pentium 4 @ 2533MHz
    ASUS P4S533 Motherboard (SiS645DX)
    2x Samsung DDR333 256MB Modules
    Verre V770 Black, NO system fans
    Arctic Alumina Thermal Compound
    Running Windows 2000 Professional, SP4

    Testing Results
    Arctic Alumina was used because my local computer/electronics store in did not stock Ceramique yet, and they didn't have any Silver III in stock (and also because my tests with the other heatsinks already used Arctic Alumina). Expected temperatures were first determined by using Motherboard Monitor, and then verified using an IR temperature sensor, recording the highest temperature achieved in the scanning area with less than 0.5 degrees difference. For recording idle temperatures, the computer is left alone for 15 minutes. For the load temperatures, I used SiSoftware Sandra, using the Burn-In test, running in the background for 15 minutes. The other heatsinks I've compared here are the Zalman CNPS5700D-Cu, as well as the Thermaltake Volcano 7+, both at various fan speeds.

    In my particular system setup, the V7+ on high setting pushed so much air through that not all of the warm air could be circulated out by the PSU fan, and in return, some of the warm air got recycled, which explains the slightly higher temperatures when compared to itself on the medium setting.

    Overclocked results for the stock Intel HSF and the AeroCool Extreme were also determined. Using the stock heatsink, I was able to reach 148MHz at 1.6V, while with the AeroCool Extreme I peaked at 155MHz at 1.7V. In order to achieve these clocks I changed the FSB to RAM ratio to 1:1, so that my modules would not become the "ceiling" for overclocking. Thanks to the idle algorithm present in both Windows 2000 and Windows XP, idle temperatures are usually lower than expected, given the operating environment. This is evidently shown in the highest overclocked test, where the processor temperature jumped almost 20* degrees Celcius. While the copper heatsink is able to conduct heat quickly off the CPU, the fan is unable to exhaust it fast enough. However, given that there were no other sources of airflow, this is expected. A system equipped with proper airflow will significantly help in reducing CPU temperatures. * If memory serves me correct, this CPU should begin throttling at 60 degrees Celcius, which may explain why the temperature did not rise above, even it had been running at 59~60 degrees for over 1/2 the time during the Burn-In test.

    As an HSF, this unit does its job very well, beating the other three heatsinks in the idle test, and sitting in the middle for the load test. However, due to its peciliar design, I strongly recommend against using this CPU under an Intel configuration, as there is no guarantee that the force of the clips alone can generate enough friction to keep the heatsink in place if the tower is stood upright. As an AMD heatsink, the fan and heatsink are already attached as one unit, so the supplied socket A clips can keep the unit securely in place.

    With that said, if you do not plan to overclock your Athlon too heavily, but want a unit that looks flashy in blue and orange, be sure to consider the AeroCool Extreme. Watch those fingers though, there's nothing between you and the spinning blades out-of-the-box!


    • Relatively quiet compared to other third-party HSFs
    • Strong performance-to-noise ratio
    • Very nice blue/orange lighting combination


    Not recommended for use on Intel CPUs

    • No included fan grille

    Thanks to AeroCool for sending us this product to review.

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