OC Labs is not one of the main names in watercooling, though they have been in the business for almost 5 years now.  Insanetek has posted a review of their Monoblock 6, a powerful performer overall.
“Great watercooling is not always limited to Swiftech, Asetek, and Danger Den. OCLabs makes a great appearance with their latest CPU waterblock. The design may be simple, but the performance is pretty good.”

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