With a 150W heat load applied by the Intel LGA775 synthetic thermal test platform, the Akasa AK-961 heatsink achieves a very nice rise above ambient temperature of 30.0°C. The heatsink's 90mm fan was spinning at 3400RPM during these tests, and so noise levels were in the 60.7 dBA range - which is a little loud. A heat load of 150W is roughly approximate to a stressed Intel Pentium D / Extreme Edition or Core 2 Quad class processor. Compared to the stock Intel Pentium D heatsink listed in the above chart, the Akasa AK-961 was 3°C cooler thanks to its slightly quicker fan.
The Akasa AK-961 heatsink was next tested with an 85W heat load, and under those condition it maintained a temperature of 18.7°C rise over ambient.
One of the side benefits to open fan, and widely spaced cooling fin heatsinks such as the Akasa AK-961, is that exhaust air is directed right at components outside the CPU socket. Critical items like the Northbridge, voltage regulating MOSFETs, and even DDR-II memory can all reach elevated temperatures if there is insufficient airflow to cool things down.
I'm not quite sure why Akasa call the AK-961 a low noise heatsink, it certainly can operate with a really slow fan speed that is nearly silent, but even in a PWM compliant system there is no way the CPU would consistently run cool enough to warrant that. Looking at the results list for the 150W test, when the 90mm fan on the Akasa AK-961 spins at full speed what we really see is a good medium-to-high performance Intel heatsink. It's not the quietest heatsink out there, but the Akasa AK-961 does out perform the stock Intel solution and that's all that really matters.
For more reviews on the latest heatsinks and cooling solutions, rely on FrostyTech's inventory of 350+ heatsink reviews. Here are a few other articles that you might enjoy as well...
Find a Heatsink / RSS Feeds
. Latest Heatsink Reviews
. Top 5 Heatsinks Tested
. News RSS Feed
. Reviews RSS Feed
. Contact Us / Heatsink Submissions
. Submit News
Images © FrostyTech.com 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.