While the Vantec CCK-6035D heatsink doesn't come out as the top cooler in my testing database, it maintains a very respectable level of cooling. It also costs about $5 USD less than many other copper heatsinks out there, so that makes it even better.
The polished base was a very nice surprise, and the addition of a silicone thermal material separate from the heatsink was a huge plus. It was rather nice not having to lap the base and scrape off a bunch of thermal tape for a change. Vantec has gotten into the habit of taking care of a lot of the small details in their product line.
Bottom line...If you have just found yourself to be in possession of one of the fast Thunderbird type processors and are looking for a reasonable cooling solution that won't break the bank, then you'll do well with the Vantec CCK-6035D HSF.
Polished copper base on sink
7,000RPM Delta fan
Included converter for power
Thinner clipping mechanism
Rating - 8.5/10
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