FrostyTech has posted a Jetart JAP416A Pentium 4 Heatsink Review

What makes the cut fins of Jetart's design so special is that they have all been make with a 1mm thick circular blade so that the bottom edge of each cut tapers out with a graceful curve. The reason for the curve is simple, contrary to a straight 90 degree bottom edge, the curved slope redirects the exhaust air out and away from the sides of the heatsink. By moving warmed air away from the heatsink, etart are able to maintain a very efficient thermal system where cold air enters the fan, and warm air is exhausted out, and away into the system. This system can also help to ensure that air velocity within the fins is kept up; though such factors can be easily influenced by adjacent obstacles.

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