Heatsink Reviews and Analysis

TOP 5 Heat Sinks     TOP 5 Low Profile Heat Sinks     TOP 5 Liquid Coolers    
 Heatsinks by Brand / Mfgr      Reviews + Articless     Advanced Search    

Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
Abstract: Thermalfly's I75DUB heatsink has a large 112mm diameter fan that spins at anywhere from 900-3600RPM (as dictated by the cleverly mounted internal thermistor).

 Manufacturer  Category  Published  Author 
Thermalfly   Cooling / Heatsinks   Feb 19, 2007   Max Page  

Home > Reviews > Page: 360° View - Thermalfly I75DUB Heatsink

360° View - Thermalfly I75DUB Heatsink
Information on Frostytech's test methodology is available here.

The Heatsink Fan:
The Thermalfly I75DUB heatsink is built with a 112mm diameter fan. The 7-bladed impeller spins at speeds of 900-3600RPM depending on the temperature of the heatsink itself (it is thermally controlled). Power is supplied by a standard 3-pin motherboard fan header. There is an 20mm plenum between the top of the aluminum fins, and the bottom of the fan impeller.

Heatsink Top:
With the fan support structure removed, the unique design of Thermalfly's I75DUB heatsink is apparent. The aluminum slug is 33mm around. The aluminum which surrounds the core is 90mm in diameter, though each side is comprised of 3.0mm of aluminum and ~26mm long straight bifurcated cooling fins. Each fin is 0.8mm thick and spaced 1.0mm apart at the base. The tips of the bifurcated fin are a scant 0.2mm thick, and spaced 1.0mm apart. This has to be among the thinnest extruded aluminum we've seen. The thermistor can be seen taped to the center of the heatsink.

Heatsink Side A:
The body of the Thermalfly I75DUB heatsink 41mm tall, and the heatsink has an overall height of 87mm. The spring tensioned screws attach directly to a rear mounted metal support plate that is included with the heatsink. The lower half of the fan is 92mm round, and at the top 112mm across. Note the two black wires leading to the thermistor.

Heatsink Side B:
The fan support frame locks onto the aluminum portion of the I75DUB heatsink with a couple slashes cut into the side of the fins. The fan frame is held in tension, so vibration and rattling isn't a problem. Air is exhausted outwards from the cooling fins, where it can then be used to cool adjacent board-mounted components. Most socket 775 Intel motherboards are designed to use this source of airflow, and so VRM and chipset heatsinks are often entirely passive.

Heatsink Base:
The aluminum base of the Thermalfly I75DUB heatsink is 35mm in diameter where it makes contact with the processors' integrated heatspreader (IHS). The heatsink ships with a thin grey pad of ShinEtsu thermal interface material pre-applied. The base is machined perfectly flat, and is very smooth. Surface roughness is on the order of ~8 microinches, which is considered excellent. The body of the heatsink is 90mm round.

 Previous Page ° ° Next Page 

Table of Contents:

 1:  Thermalfly I75DUB Bifurcated Fin Socket 775 Heatsink Review
 2: — 360° View - Thermalfly I75DUB Heatsink
 3:  Acoustic Comparisons and Base Surface Quality
 4:  Intel LGA775 Heatsink Temperature Comparisons

List all Thermalfly heat sinks that Frostytech tested?

Facebook RSS Feed Twitter
° Got Feedback?
° Mk.II Test Platform
° Where To Buy?
° Manufacturer Index
° Industry Dir.
° Cooling Projects
Recently Tested

Scythe Mugen 5 Rev B SCMG-5100 Heatsink Review

Gelid Tranquillo 4 Air Cooled Heatsink Review

Coolermaster Ergostand III Laptop Cooling Stand Review

Noctua NH-D9DXi4-3U LGA2011 Xeon Server/Workstation Heatsink Review

Noctua NH-L9x65 Low Profile Heatsink Review

Scythe Fuma SCFM-1000 Heatsink
...More Articles >>

Websites you may also like:
Since June 1999

Find a Heatsink
Latest Heatsink Reviews
Top 5 Heatsinks Tested
Top 5 Low Profile Heatsinks
Top 5 Liquid Coolers
Heatsinks by Mfgr / Brand

Social Media
Pinterest Info
Contact Us / Heatsink Submissions
Submit News
Privacy Policy
Suite 66

© Copyright 1999-2023 All Rights Reserved. Privacy policy and Terms of Use
Images © and may not be reproduced without express written permission. Current students and faculty of accredited Universities may use Frostytech images in research papers and thesis, provided each image is attributed.