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Spire SP411C5 QuieTude II Heatsink Review
Spire SP411C5 QuieTude II Heatsink Review
Abstract: At 300RPM the SP411C5 is good in the noise department, but at higher temperatures it can get somewhat loud.

 Company link  Category  Published  Author 
Spire   Cooling / Heatsinks   Sep 01, 2003   Max Page  
Home > Reviews > Page Title: Closer Examination of the Heatsink

Spire SP411C5 Heatsink From All Angles
The Fan:
The 70mm fan measures 25mm thick and sports an seven bladed impeller. The fan produces minimal noise, though it draws 0.4A under power. With a metal wire grill attached to the fan, problems with loose wires getting caught in the blades should be avoided. The fan connects to the motherboard fan header through a nylon meshed wire, and supports RPM monitoring.

Heatsink Top:
There are a series of seven 2mm wide crosscuts on either side of the heatsink which have probably been made to improve exhaust airflow at the outer edges. The cross cuts also provide a space for the thermal sensor from the fan to be tucked away. The fins are all smooth faced, and separated 1.5mm apart. Each fin is slightly tapered from the bottom to the top. The lever around the fan swings to one side to lock in a set of spring clips into the HSRM.

Side A:
The aluminum base measures ~11mm thick, and contains a nice copper core. The fins are 30mm tall, and are just 1mm thick. The top portion of the heatsink has a rather larger plastic fan shroud and retention mechanism built into one apparatus. By moving the lever 180 degrees the stainless steel spring clips close in, locking the heatsink pretty securely into the HSRM. The Spire SP411C5 heatsink stands 76mm tall.

Side B:
Here we see another shot of the clip mechanism which is used to lock onto the HSRM. Each corner has a small metal tab which locks into the plastic tab to hold the Spire SP411C5 firmly in place. The outside of the heatsink has a serrated finish, mainly to improve grip.

Heatsink Base:

The cross cuts slice 8mm into the sides of the SP411C5, and after a quick check with the machinists' straight edge we can clearly see that the base has been very well finished. The surface is perfectly flat, and very smooth (a quick test is simply to check if the crystalline structure of the aluminum is visible via some reflected light - and it is). The copper insert is 45mm in diameter, and probably 6-8mm thick. A hole is drilled into the base and the copper plug squeezed in under higher pressure for a good interference fit.

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Table of Contents:

 1:  Spire SP411C5 QuieTude II Heatsink Review
 2: — Closer Examination of the Heatsink
 3:  Heatsink Thermal/Acoustic Test Parameters
 4:  Acoustic Samples: Listen to this Heatsink!
 5:  Final Temperature Results

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