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Scythe Ashura Shadow Heatsink Review
Scythe Ashura Shadow Heatsink Review
Abstract: The Scythe Ashura Shadow is a dark nickel plated version of the vanilla Ashura heatsink Scythe also has on the market. Structurally, there's no difference between the two coolers, aside from the cosmetic metal coating. The Ashura Shadow heatsink stands 162mm tall and has a footprint of 145x89mm so it should fit most motherboards without memory slot interference.

 Manufacturer  Category  Published  Author 
Scythe   Cooling / Heatsinks   Feb 17, 2014   Max Page  

Home > Reviews > Page: 360° View - Scythe Ashura Shadow Heatsink

360° View - Scythe Ashura Shadow Heatsink

Information on Frostytech's test methodology is available here.

Scythe's Ashura Shadow heatsink ships with a 140mm PWM fan that draws power from a standard 4-pin fan header. The 162mm tall heatsink has six 6mm diameter copper heatpipes rising up through a 107mm tall fin stack. The nickel plated aluminum fins measure 0.4mm thick and are spaced 2.0mm apart. The bottom-most fin is elevated 41mm above the socket for good motherboard component clearance.

Wire fan clips lack thumb holds so they are less likely to interfere with the back of a videocard; the entire heatsink is no wider than 145mm. The heat pipes are soldered to the copper base plate/aluminum top cap and swaged into the nickel plated aluminum fins. The outer-most heatpipes are piped to the center of the base plate and the inner-most heatpipes to the outside of the base plate. This arrangement conducts CPU heat to the region of aluminum fins which receive the highest airflow.

The nickel plated copper base of the Scythe Ashura Shadow measures 43x43mm in size and is between 2-5mm thick. The aluminum support on the top-side of the heatpipes is 9mm thick. A sacrificial aluminum fin hides the presence of the heatpipes on the top of the heatsink, presenting a clean visual appearance. The leading and trailing edges of each fin also have a small crimp to help break up laminar airflow.

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 engineer's straight edge or proven flat surface, in two axes.

Scythe's Ashura Shadow heatsink has a dark nickel plated copper base plate / heat spreader. By the looks of it, the small square of copper was turned in a lathe and whether by design or mistake, is slightly convex in both axes. The machined finish of the base is very smooth, surface roughness is higher than ~16 microinches.

Case in point, here's how much of the Ashura Shadow base makes contact with a perfectly flat surface:

Sound level measurements are coming up next on Frostytech...

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Table of Contents:

 1:  Scythe Ashura Shadow Heatsink Review
 2: — 360° View - Scythe Ashura Shadow Heatsink
 3:  Sound Level Measurements: Which Heatsink is Quietest?
 4:  AMD Heatsink Temperature Comparisons
 5:  Intel LGA115x/775 Heatsink Temperature Comparisons
 6:  Intel LGA2011 Heatsink Temperature Comparisons

List all Scythe heat sinks that Frostytech tested?

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