OCZ Vendeta heatpipe CPU Cooler Review
 

In case you haven’t noticed, something sets this cooler apart
from practically every other cooler on the market today. It has its
heatpipes exposed which allows them to make direct contact with the
CPU. This should lead to very efficient cooling as it has removed the
need for a solid copper base as a transition layer between the
heatpipes and the CPU.

http://www.xtremecomputing.co.uk/review.php?id=379