HS tested the SilverStone HE02, a CPU cooler with six heatpipes and, according to the manufacturer, can be used without fans.

Here is a snippet: "The HE02 is a CPU cooler from SilverStone that has a tower heatsink, six heatpipes, and can be used in passive mode, i.e., without any fan. Let's test it and see if it really works well without a fan."



Link: Hardwaresecrets