thing has happened to CPUs, their not as hot as they used to be.
In some cases, Intel Core 2 Duo processors are pushing out as little as 65W, while some Celeron chips output just 35W of
heat! It's quite a change from the long standing belief that newer processors will always
output more heat. Die shrinks, moving from 90nm to 65nm, and now 45nm,
mean more circuits are packed into ever decreasing spaces. Smaller circuits are more efficient, consequently electrical
requirements and the subsequent heat output falls.
What does this mean to you? It means
you should know your processor's TDP (Thermal Design Power) before going
heatsink shopping. Take for example the heatsink Frostytech is testing
today. This is a fairly compact socket 775 cooler, made just of extruded aluminum with an 80mm fan atop. The Glacialtech Igloo 5058
Light E is rated for 35W Celeron, 65W Core 2 Duo and 95W Core 2 Quad processors...
though it would be hard to imagine anyone replacing the boxed Quad-core
heatsink for something as basic as this. No, I think it's best
to look at the Glacialtech Igloo 5058 Light E as a compact and quiet heatsink for
energy efficient heatsinks in the 65W region.
Glacialtech's Igloo 5058 Light E heatsink stands a
squat 55mm tall and comes with a fixed
speed 80mm fan that rotates at a quiet 2600RPM. Weighing
in at a feather 263grams, the Igloo 5058 is compatible with Intel socket 775
CPUs outputting 95W heat or less. Though for the best
results, we'd change that to 65W or less.
|Glacialtech Igloo 5058 Light E
| Model No.: Igloo 5058 Light E|
Materials: extruded aluminum|
|Fan Mfg: Powerlogic PLA08025S12H|
|Fan Spec: 2600RPM, 12V, 0.17A|
|Fan Dim: 25x80x80mm|
|Heatsink & Fan Dim: 55x89x89mm |
|Weight: 263 grams|
Includes: thermal compound, instructions|
Compatible with Sockets: LGA775
|Est. Pricing: $20USD
There's not a lot else that needs to be said about the Glacialtech Igloo 5058 Light heatsink, other than to reiterate that it's best suited to smaller
enclosures where vertical height is restricted, and to energy efficient
processors that don't run very hot. It should be suitable for 65W or 35W processors, but it is
not suitable for 150W CPUs at all.
Base Finish and Flatness
Flipping a heatsink over to inspect the business
end is often a simple indicator of overall cooler quality. More practically
speaking, a heatsink is in many ways only as effective as the contact it makes
with the processor - the flatter and smoother the better. Base finish is one of
the criteria that Frostytech measure in the course of evaluating heatsinks, and
it involves two distinct aspects. Surface Finish is the first; this is
calculated with the aid of Surface Roughness Comparator that has a cross section
of common machine surface finishes and their numerical surface roughness
equivalents in microinches. The second is Surface Flatness. This is tested with
an engineers straight edge or proven flat surface, in two axis.
The base of the Glacialtech Igloo 5058 Light E
heatsink has a surface roughness of ~16 microinches. The base is 33x33mm in size
and flat in both axis. A patch of good quality shin-etsu thermal compound is
pre-applied to the base.
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!