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EKL Alphenfohn GroB Clock ner Blue Edition Heatsink Review
EKL Alphenfohn GroB Clock ner Blue Edition Heatsink Review
Abstract: The EKL Alphenfohn GroB Clock ner Blue Edition heatsink is unique for a couple reasons...

 Manufacturer  Category  Published  Author 
EKL   Cooling / Heatsinks   Oct 06, 2008   Max Page  

Home > Reviews > Page: 360° View - EKL Alphenfohn GroB Clock'ner Blue Edition Heatsink

360° View - EKL Alphenfohn GroB Clock'ner Blue Edition Heatsink

Information on Frostytech's test methodology is available here.

The 120mm fan on the EKL Alphenfohn GroB Clock'ner heatsink spins at 1500RPM by default. An optional fan speed controller can drop that down for quieter operation is desired, or the PWM controls can bring speed to about 800RPM. A 4-pin PWM motherboard header provides power. Note the AMD K8-style mounting clip attached to the copper base block, this one clip allows tool-free attaching to both Intel and AMD processors.

The EKL Alphenfohn GroB Clock'ner Blue Edition stands 154mm tall. Its raw aluminum fins are press-fit over the four 8mm diameter copper heat pipes. The bottom fin is elevated 36mm above the base for adequate motherboard clearance. The aluminum fins measure 0.3mm thick and are spaced 2.0mm apart. The copper/heatpipe base is 10mm thick.

The fully copper base of the EKL Alphenfohn GroB Clock'ner Blue Edition has a machined surface finish. The portion of the base that comes in contact with the CPU measures 45x42mm. Looking at the top of the Alphenfohn GroB Clock'ner Blue Edition we see the aluminum fins are roughly 125 x 75mm in size, and the trailing edge has a slight bend to direct airflow down towards motherboard components.

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, in two axis.

EKL's Alphenfohn GroB Clock'ner Blue Edition heatsink has a machined base with a surface roughness of approximately ~32 microinches. The manufacturer has purposefully given the surface a very fine ridged texture. The base is perfectly flat in one axis and generally flat in the direction perpendicular to the heatpipes.

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Table of Contents:

 1:  EKL Alphenfohn GroB Clock ner Blue Edition Heatsink Review
 2: — 360° View - EKL Alphenfohn GroB Clock'ner Blue Edition Heatsink
 3:  Acoustic Noise Measurements
 4:  AMD K8 Heatsink Temperature Comparisons
 5:  Intel LGA775 Final Heatsink Temperature Comparisons

List all EKL heat sinks that Frostytech tested?

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