Viper's Lair has posted a review on the Cooler Master Ram Chip Coolers

The aluminium sinks whilst getting quite warm to the touch didn't help in further increasing the overclock of the ram. The copper versions however did help in stabilising the overclock, producing a stable windows environment at 175 FSB. The thermal properties of copper are such that it can draw heat away very quickly indeed, but it also has a tendency to keep that heat.

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