Air cooling is still going through innovations.  Thermalright’s SI-97 is about half the weight of most newer heatsinks, so it doesn’t need to be screwed into the 4 mounting holes, it can use a retention clip, and one that sounds easy to work with, partially because of the unique design of the SI-97.
“Thermalright are renowned for their quality performance heatsinks throughout the enthusiast and overclocking community. Their latest offering for the aging but popular Socket A market, is the SI-97. In Thermalright terms, this is a different kind of heatsink. By abandoning the bolt-through retention mechanism in such a large heatsink, they have limited the use of this heatsink, creating a different market all together: the audiophobic enthusiast market. Today we’ll see just how well it performs, in a range of different situations.”

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