Using GPUZ sensor log to track the various temperature readings, I wanted to compare the factory cooler with the VF3000A set on its minimum fan speed. As can be seen above, even with reduced frequency and voltage, the stock cooler allows the core to reach 39°C at idle. The VF3000A on the other hand drops this significantly, down to only 30°C, a 9°C difference. When put under a heavy FurMark load, the GPU still only reaches 60°C with the VF3000A, a huge decrease compared to the stock cooler.
Adjusting the fan speed up to the maximum, temperatures are reduced a further 6°C at load, although idle temp is not affected. Even at 32dB, the VF3000A fans are not nearly as offensive as the factory cooler when it's cranked up, and performance is much improved. With the cooler temperatures, ATI Auto-Tune is able to hit 1028MHz on the core, 50MHz higher than the stock cooler managed. Unfortunately just as we found before, the Auto-Tune frequency is not stable without a voltage increase, adding +0.04v to the factory setting. That was about all the voltage we could add with the stock cooler and still manage to keep our sanity from the noisy fan, however with the VF3000A you've got quite a bit more headroom to continue increasing voltage and shoot for even higher clocks.
Just to recap, here are the temps from the stock ASUS V2 cooler left on Auto speed, compared to the Zalman VF3000A on minimum and maximum fan speeds.
Let's wrap things up with some final thoughts and conclusion.