As AMD releases its energy efficient processors with power loads in
the range of 65W and 35W, simple extruded aluminum heatsinks are once again becoming
common. Ultra low power "environmentally friendly" processors emit significantly less heat, and consequently less
extensive thermal solutions can often do the job. The real crux
of the deal is the very low cost of an extruded
aluminum heatsink compared to a complicated copper cooler.
Testing low power heatsinks is
a bit challenging right now because Frostytech's K8 test gear is configured to a
125W synthetic heat load. Given the new class of low power AMD's Athlon64
and Sempron processors, you'll have to look at our synthetic thermal tests as
a worst case scenario stress test.
In this review Frostytech will be examining the Glacialtech Igloo
7311 Silent AMD Athlon 64 heatsink. Can this simple extruded aluminum heatsink keep the Athlon64-class
processor below running cool? We'll soon find out...
Glacialtech are Taiwanese thermal solutions
manufacturer, and while the company has typically focused
on OEM work until recently, it is
now aiming to make its name known. That's all well and good, but
at Frostytech we look at such things one heatsink at a time. If Glacialtech has the thermal
engineering to back up its products, that's all we need to
|Glacialtech Igloo 7311
|Model No.: Igloo 7311 Silent|
|Materials: Extruded aluminum|
|Fan Mfg: Power Logic PLA08025S12L|
|Fan Spec: 2000RPM, 12V, 0.1A|
|Fan Dim: 25x80x80mm|
|Heatsink & Fan Dim: 71x77x83mm |
|Weight: 395 grams|
|Includes: Pre-applied thermal
Compatible with Sockets: 754/939/940/AM2
|Est. Pricing: $15USD
Glacialtech Igloo 7222 Light, the Igloo 7311 Silent heatsink is suitable
for 65W and 35W energy efficient Socket AM2 AMD processors, or
older socket 754/939/940 CPUs. Its 25x80x80mm fan operates at a fixed
speed of 2000RPM, and is not PWM compliant. The Igloo 7311 Silent
has a nice tool free clip mechanism, making a reassuring positive "clip" as it locks
down on the central lug of the AMD heatsink retention frame (either 939 or
AM2 variety). The unit ships with a pre-applied patch of high viscosity thermal
compound on its base.
Given our past experiences with the 400 or so
heatsinks Frostytech has tested to date, we'll be keeping our expectations
tempered for the Igloo 7311 Silent...
FrostyTech's Test Methodologies are outlined in detail
here if you care to know what equipment is
used, and the parameters under which the tests are conducted. Now let's move forward
and take a closer look at this heatsink, its acoustic characteristics, and of
course its performance in the thermal tests!
|360° View - Glacialtech
Igloo 7311 Silent Heatsink
Information on Frostytech's test
methodology is available
The Heatsink Fan:
The 25x80x80mm fan spins at
2000RPM, drawing power from a standard 3-pin motherboard fan header. The fan
supports RPM monitoring but not PWM speed control. The seven-bladed impeller is not
protected by a fan grill, but as rotational speeds are low this
isn't a major concern.
With the fan removed from
the body of the Glacialtech Igloo 7311 Silent heatsink we can see
its basic extruded construction. Each aluminum fin is ~0.75mm thick, and spaced ~1.5mm
apart. The steel clip fits in between two spaces, so it does not prevent
air from flowing smoothly through the body of the heatsink (as a large
central clip body might).
Heatsink Side A:
Standing 70mm high, the Glacialtech Igloo 7311 Silent uses
a tool-free clipping system. The clip locks onto the central retention lug so both AM2
and 939 motherboards are compatible. The outside of the extruded aluminum
body is scalloped, this improves grip and surface area to some extent.
Inner fins are smooth.
Heatsink Edge A:
The base measures 6mm thick, fins are on average 35mm tall. Note the
tool free clip. In one operation it clips onto and toggles down to apply
clamping force to the processor. We really like the simple and assuringly "engaged"
feel this clip has when engaged.
||Heatsink Edge B: |
The 80mm fan screws directly into the
aluminum heatsink, a common attachment method for inexpensive thermal
solutions. The plenum is around 4mm between the tips of the fins and the base
of the fan.
The base of the Igloo 7311 Silent
heatsink is machined with a obvious ridge over the entire surface. A patch
of grey thermal compound is applied by the manufacturer, and this works
in conjunction with the rough base surface finish. The base measures
77x60mm in size. Surface roughness is equivalent to ~125 microinches,
which is satisfactory for this application.