From the press release:
"Extreme Cooling Performance
The Accelero XTREME GTX 280 is equipped with three 92mm PWM fans that run from 1,000 to 2,000 RPM. Together with five heatpipes, the Accelero XTREME GTX 280 achieves 250 Watt cooling capacity – 31°C lower th an the stock cooler. This exceptional cooling performance will not only bring enthusiasts an ultimate overclocking experience, but it also extends the service life of your valuable graphics card.
