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    

Aopen ACP4LC Pentium 4 Heatsink Review
Aopen ACP4LC Pentium 4 Heatsink Review
Abstract: Aopen's fan adaptor allows an 80mm Nidec fan to mount to the 70mm heatsink frame. The point of this, is of course to reduce the noise created by the fan by using a larger and slower rotating impeller.

 Manufacturer  Category  Published  Author 
AOpen   Cooling / Heatsinks   Oct 26, 2003   Max Page  

Home > Reviews > Page: Closer Examination of the Heatsink
Aopen ACP4LC Heatsink From All Angles
The Fan:
The 80mm Nidec fan measures 25mm thick and sports an seven bladed impeller. The fan produces about 48dBA and draws 0.13A. If a metal wire grill had been attached to the fan, problems with loose wires getting caught in the blades wouldn't be an issue. The fan connects to the motherboard fan header and supports RPM monitoring.

Heatsink Top:
The fan clips into a plastic fan shroud which reduces the overall size from 80mm to just 70mm. This allows the larger fan to be attached to the smaller width heatsink. Inside the cone-shaped fan shroud are a series of blades whose purpose it is to constrain and direct the airflow from the larger 80mm fan evenly. Since the fan shroud clips into both the heatsink and fan, no screws are required.

Side A:
This is a tall heatsink, and given that it measures 98mm high, may not fit in certain small form factor computer chassis. From this side we get a better perspective concerning how this heatsink is actually built. The base is 7mm thick and the fins 1mm. Fins are spaced ~2mm apart and measure 37mm long. The clips which lock into the P4's HSRM are screwed into the copper base, and are pretty easy to operate.

Side B:
The clip mechanism which is used to lock onto the HSRM is simple and pretty effective. Each corner has a small tab which locks into the plastic tab to hold the ACP4LC firmly in place. Here again we can see just how thick the copper base is.

Heatsink Base:

The copper base measures 83x69mmn size, and is 7mm thick. The copper is soldered in place so the thermal interface should be pretty decent. The base has a milled finish which is pretty smooth, and quite flat. The heatsink comes with a small aluminum/graphite thermal interface pad pre-installed.

 Previous Page ° ° Next Page 

Table of Contents:

 1:  Aopen ACP4LC Pentium 4 Heatsink Review
 2: — Closer Examination of the Heatsink
 3:  Heatsink Thermal/Acoustic Test Parameters
 4:  Surface Roughness Comparison
 5:  Acoustic Samples: Listen to this Heatsink!
 6:  Final Temperature Results

List all AOpen 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

Arctic Liquid Freezer 120 CPU Watercooler Review

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
...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 1999-2024 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.