Outstanding Cooling Performance Accelero Twin Turbo 690 features two 120 mm PWM fans with an impressive cooling capacity of 400W. It consists of a sizable heatsink with 86 aluminum fins, 10 copper heatpipes & pre-applied MX-4 thermal compound to reduce the GPU temperature by up to 22 degrees more than the stock cooler. It is designed to boost overclocking performance & the longevity of your NVIDIA Ge Force GTX 690 graphics card. Ultra Quiet PC-Max texted the Accelero Twin Turbo 690 & it remaine inaudible at all scenarios they've tested, from idle, gaming to full load. With the PWM control, the fan operates according to the temperature of the GPU & thus the fan is running at optimal speed at all times. The PWM settings can be modified according to your preference for cooling performance & noise level. Click here to see how the PWM settings work Special Design for NVIDIA Ge Force GTX 690 Uniquely designed cooling solution for the NVIDIA Ge Force GTX 690 graphics card, the Accelero Twin Turbo 690 offers unmatched cooling performance.