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The ZM-WB6 is the newest Zalman model water-block for cooling the CPU. Excellent performance as you'll see later on. The kit comes with everything you need including clamps, thermal paste, screws, retention brackets for all popular CPU sockets.
The ZM-WB6 supports Intel Socket 775 and AMD Socket 754/939/940/AM2 CPUs, and is designed to be light weight and easy to install.
The ZM-WB5 is Zalmans latest and best Zalman CPU waterblock. It has a pure copper base for good heat transfer.
Interestingly enough the waterblock cover has been anodized to prevent corrosion. It's really flat; chemically washed/lapped. Thumbs up for sure.